Panax ginseng

Panax ginseng is a herbaceous perennial that stands 30 to 60 cm tall on a single upright stem. The stem rises each spring from a short underground rhizome, often called the neck, which adds one stem scar a year and lets a careful buyer count the age of a root. Below the neck sits a fleshy taproot shaped like a spindle or a cylinder, usually with one or two main branches and many fine feeder roots. ^[2][6]

The leaves sit in a whorl at the top of the stem. A mature plant carries three to six palmately compound leaves, each with three to five leaflets whose margins are finely and densely toothed. The central leaflet is the largest at 8 to 12 cm long and 3 to 5 cm wide, the side leaflets are smaller, and the upper surface carries sparse short hairs. A one year seedling has one small leaf, a two year plant has two, and the number of leaves, or prongs, rises with age until five prong plants appear at five years and older. ^[2][6]

Flowering comes in early summer. A single terminal umbel on a stalk 15 to 30 cm long holds 30 to 50 small greenish white flowers, each with a two carpel ovary and two separate styles. The fruits are bright red, slightly flattened drupes about 4 to 5 mm tall and 6 to 7 mm across that ripen in late summer, and each holds one to three white kidney shaped seeds. In Korea bud break and leaf expansion run through April and May, flowering and fruit set through May and June, berries colour in July and August, and the tops die back by October. ^[2][6]

The forked root is what gave the plant its name. Older roots thicken, branch, and take on a loose human shape with a head, a body, and two legs, and in Korea the roots that look most like a seated man have always fetched the highest prices. Wild roots tend to be thinner, longer, and less branched than farmed roots, which domestication has pushed toward a short thick body and broad leaves for yield. ^[5][13][19]

The species has 48 chromosomes and is a tetraploid, which means it carries two full ancestral genomes. The first assembled genome, published in 2018, covered about 2.98 billion base pairs with roughly 59,000 genes, and it showed that the family Araliaceae went through two whole genome duplications. The same work found an unusual number of chlorophyll binding protein genes, which helps explain how the plant photosynthesises well in deep shade, and extra fatty acid desaturase genes that help it survive hard winters. ^[4]

The genus Panax belongs to the family Araliaceae in the order Apiales, alongside ivy, aralia, and the devil's club. Carl Linnaeus created the genus in 1753 when he described the American species Panax quinquefolius, and he built the name from the Greek pan (all) and akos (remedy), the same root as the word panacea. The Russian botanist Carl Anton von Meyer separated the Asian plant from the American one and named it Panax ginseng in 1842, with the full account printed in 1843 in the bulletin of the Imperial Academy of Sciences in St Petersburg. ^[1][2][19]

Earlier European names survive as synonyms. Theodor Nees von Esenbeck had called the plant Panax schinseng in 1833, Regel and Maack treated it as a variety of the American species, Baillon moved it into Aralia, and Oken offered Panax verus. All of these fell to Meyer's name. The genus holds about a dozen accepted species, with centres of diversity in East Asia and two species in eastern North America, and molecular work dates the split of Panax from Aralia to the late Miocene. ^[1][2][4]

The English word ginseng entered the language through Hokkien, the southern Chinese language of Fujian and the overseas trading ports, where the plant is called jîn-sim. The Mandarin reading of the same two characters, 人參, is rénshēn. The first character means person, and the second is an old word for a forked root, so the name says "man root" and refers to the root's human shape. The Jesuit Pierre Jartoux, writing from Manchuria in 1711, explained to his readers that the name meant the likeness of a man. ^[20][23]

Across the native range the plant carries the same two characters read in local ways. Korean uses insam (인삼) for cultivated root and sansam (산삼, mountain ginseng) for wild root, Japanese uses ninjin or Chōsen ninjin (Korean ginseng), and Vietnamese uses nhân sâm. The United States Pharmacopeia and the European Pharmacopoeia both carry monographs that identify the root by its ginsenoside pattern on liquid chromatography, which separates it from American ginseng and from fillers. ^[1][22][55]

Many unrelated plants borrow the name. The most common is Eleutherococcus senticosus, promoted by Soviet researchers in the mid twentieth century as "Siberian ginseng" even though it is a woody shrub with a different chemistry. Since 2002 United States law has limited the word ginseng on labels to plants in the genus Panax, so the shrub is now sold as eleuthero. The lookalike list is covered in the section on red, white, and lookalikes below. ^[56][60]

The wild plant is native to the mountain forests of the Korean Peninsula, the Chinese provinces of Heilongjiang, Jilin, and Liaoning, and Primorye in the Russian Far East. Its heartland is the Changbai range on the border of Jilin and North Korea, which Koreans call Baekdu, together with the Taebaek spine of the peninsula and the Sikhote Alin hills north of Vladivostok. It is also recorded as a recent crop in Hebei and Shanxi, and has been grown in Japan since the eighteenth century. ^[1][2][3]

It grows as an understorey herb in mixed and deciduous broadleaf forests between roughly 500 and 2,000 metres, where tall trees leave only a few percent of full sunlight at ground level. It likes cool summers, deep humus, and well drained loam on north or northeast facing slopes that stay moist without waterlogging. Studies on farmed plants show that the root forms partnerships with arbuscular mycorrhizal fungi that help it draw phosphorus from poor forest soils. ^[2][7][8]

Wild ginseng, called sansam in Korea, is gathered by specialist foragers known as simmani, who still shout "sim bwatda" (I have seen ginseng) when they find a plant. Wild roots are far scarcer than they were a century ago. Overcollection has removed the species from most of its historical range, the Russian Primorye populations are described as exhausted and in need of restoration, and wild roots in China are now very rare. Mountain cultivated ginseng, known as jangnoesam in Korea and as forest grown or wild simulated ginseng elsewhere, is seed sown in natural forest and left to grow like a wild plant for ten years or more. ^[9][13][19]

Seed and stratification

Ginseng seed will not sprout in the spring after it is picked. The embryo inside a fresh seed is tiny and undeveloped, so the seed needs a warm, moist period of several months for the embryo to grow and the hard coat to split, which growers call dehiscence, and then a cold period over winter to end its dormancy. Korean farmers harvest berries from three and four year plants in July, wash out the seed, bury it in moist sand through late summer, and sow the opened seed in November so that it germinates the following spring. Geumsan farmers call this traditional stratification ingongbala, and seeds that are not stratified sit in the ground for an extra year. ^[6][8]

Site, shade, and soil

A ginseng field, called a bat in Korea, copies the forest floor. Farmers choose gently sloping land that faces north or northeast so that the plants get soft morning light and escape the hot afternoon sun. They want a sandy loam over granite with plenty of leaf mould, a pH near 5.5 to 6.5, and sharp drainage, and they build raised beds that run across the slope. ^[7][8]

Shade is the defining practice. In the traditional Geumsan system, which the FAO recognised as a Globally Important Agricultural Heritage System in 2018, farmers raise a sloped canopy of straw, reeds, or grass on wooden posts, open on the north side so that cool air flows through, a method they call haegarim. Modern farms use blue or black polyethylene shade cloth on steel frames. Trials in Korea show that ginseng grows and makes the most ginsenosides when 13 to 17 percent of full sunlight reaches the leaves, that less light gives thin plants, and that more than about 20 percent scorches the leaves in summer. ^[7][8]

The four to six year cycle

Most Korean fields follow a two stage plan. Seed is sown densely in a nursery bed, the one year seedlings are lifted the next spring and graded, and the best are transplanted at wider spacing into the production field. The crop then stays in place until it is four, five, or six years old, growing a new stem each spring and dying back each autumn. Harvest comes in September or October before the ground freezes, when the roots are dug by hand or by a lifting machine, washed, and sorted by size and shape. ^[6][8]

Roots gain weight and ginsenosides with every year, which is why the age of a root sets its price. Six year roots are the standard for premium Korean Red Ginseng because the body is full and the saponin content is high, while older roots risk rot and yield less per year of waiting. Korea Ginseng Corporation reports that only a small share of its six year roots reach the top grade. ^[13][17]

Replant disease and rotation

Ginseng cannot follow ginseng. Root rot organisms build up in the soil over a crop cycle, and the ginsenosides that leak from the roots change the soil microbiome in a way that favours these pathogens, so a second crop on the same ground fails. Korean practice answers this with a long rotation of ten to fifteen years in which the land goes to rice, other grains, or other herbs, and farmers prepare a future ginseng field for one or two seasons by growing green manure and turning it in before they sow. Growers also watch for anthracnose caused by Colletotrichum panacicola, Alternaria leaf blight, Phytophthora root rot, rusty root, and slugs. ^[5][6][8]

Cultivars and new technology

For most of its history the crop was a landrace, but Korea has registered a dozen cultivars and China nine. Chunpoong, bred in Korea, resists rusty root better than the old Jakyung landrace, grows a well shaped root, and is widely planted for red ginseng, while the Chinese cultivar Jilin Huangguo Renshen carries more ginsenosides than local stock. Breeders now select for root shape, yield, disease resistance, heat tolerance, and saponin content. ^[5]

Research farms grow ginseng in hydroponic and aeroponic systems under LED light, where a sprout crop can be ready in a few months and white or far red light raises ginsenoside levels. Tissue culture gives disease free plantlets, and hairy root cultures started with Rhizobium rhizogenes produce ginsenosides in bioreactors without any soil at all. These systems supply cosmetic and food ingredients, while the traditional field root remains the medicine. ^[4][29]

Growing regions

In Korea the ginseng districts are Geumsan in South Chungcheong, Punggi in Yeongju in North Gyeongsang, Ganghwa island, and the old centre of Gaeseong, now in North Korea. Punggi traces its industry to 1541, when the county magistrate Ju Se-bung moved wild plants from the Sobaek mountains into fields, and Geumsan traces its cultivation to the fifteenth century and its market to the late Goryeo period. In China the crop is concentrated in Jilin province, which grows about 60 percent of the national total around the Changbai mountains and towns such as Ji'an, Fusong, and Tonghua. In Russia a small industry grows the plant in Primorye near the wild stands. ^[8][63][68]

Fresh ginseng

Freshly dug root, called susam in Korea, is 70 to 80 percent water and keeps for only a few weeks in a cool store. Koreans buy it whole for soups and tea, and in the Korean market fresh root is one of the main ways the crop is sold. The main root makes up about three quarters of a root's weight, with lateral and fine roots the rest. ^[12][13]

White ginseng

White ginseng, baeksam, is fresh root that is peeled and dried without steaming. Drying in the sun or with warm air brings the water content down to about 12 percent or less and leaves the root pale yellow and wrinkled. White ginseng keeps the raw ginsenoside profile, with high levels of Rb1, and it is the form used for most traditional decoctions and for much of the world's powdered ginseng. ^[13][15]

Red ginseng

Red ginseng, hongsam in Korean and hóngshēn in Chinese, is whole unpeeled root steamed and then dried. The method is old. A Song dynasty envoy, Xu Jing, described steamed ginseng in Korea in 1123 in his Goryeo Dogyeong, and the 1908 Korean bulletin Samjung Yolam records roots washed, sized, steamed in sealed clay steamers for 50 to 90 minutes, dried indoors, and then sunned for four or five days. Modern plants steam washed roots for one to three hours at 90 to 98 °C, then dry them with hot air and sunlight to 15 percent water or less. The heat turns the root a translucent reddish brown and gives it a shelf life of years. ^[13]

Steaming changes the chemistry. Starch breaks into maltose, amino acids and sugars join in the Maillard reaction to form arginine fructose glucose and the brown pigments, and the big ginsenosides Rb1, Rb2, Rc, and Rd lose sugars and water to form smaller, less polar ginsenosides such as Rg3, Rk1, Rg5, Rh1, and Rh2 that are rare or absent in raw root. Acidic polysaccharides rise to about 4.5 to 7.5 percent, and red ginseng scores higher than white ginseng in antioxidant assays. ^[13][14][15]

Taegeuk, black, and sun ginseng

Taegeuk ginseng (taegeuksam) is fresh root blanched in hot water and then dried, a middle path between white and red that Korea counts as its fourth root type. Black ginseng is made by steaming and drying root nine times, which drives the saponin profile further toward Rg3, Rg5, and Rk1, raises phenolics, and produces maltol and other Maillard products. Sun ginseng is a laboratory development in which root is steamed at 120 °C in an autoclave; at that temperature Rg3 and Rg5 become the main ginsenosides, and the extract relaxes blood vessels and scavenges radicals more strongly than raw root. ^{[12][14][15][16]}

Extracts

Korean Red Ginseng extract is made by soaking red root, main root and fine root in the natural 75 to 25 ratio, in water at about 90 °C for 14 to 16 hours and concentrating the liquid to a thick paste of 70 to 73 Brix. A typical extract carries about 6 mg of Rb1 per gram along with Rg1, Re, Rc, Rb2, and Rd, plus polysaccharides and amino sugars. Standardised dry extracts for capsules, such as the Swiss extract G115 used in many European trials, are set to a fixed ginsenoside content, usually 4 percent, so that each dose is the same. ^[13][33]

Korean law grades red ginseng roots by hand. Inspectors look at the shape of the body, the colour and translucency of the inside, the skin, and any cracks or hollows, and sort six year roots into heaven (cheonsam), earth (jisam), and good (yangsam). Heaven grade is a small fraction of the crop, and Korea Ginseng Corporation says its top heaven extract comes from only about half of one percent of its red ginseng. Roots are also sized by count per 600 g, so a "20 ji" root is one of 20 to the traditional geun weight. ^[17]

Korea Ginseng Corporation sells under the CheongKwanJang (also romanised JungKwanJang) brand, whose name means "a mark of authenticity". The company dates its origin to 1899, when the Korean Empire set up the Samjeonggwa, a ginseng office that regulated red ginseng and raised money for the treasury. Red ginseng stayed a state monopoly until 1996, the ginseng arm was spun out of the tobacco monopoly in 1999, and the group was privatised in 2002. CheongKwanJang held about 48 percent of the world ginseng category by value in 2021 according to Euromonitor. ^[17][18]

Shops sell ginseng in many forms. Whole dried roots come boxed as gifts, sliced root goes into tea and soup, and factories turn the extract into pouches, capsules, tablets, soft gels, candies, jellies, drinks, and cosmetics. Sellers in Europe and North America market standardised capsules of white ginseng extract, while Korean brands focus on red ginseng extract and six year root. Our guide to choosing a ginseng supplement explains how to read these labels, and the red versus white ginseng guide compares the two main forms. ^[12][13]

China

The earliest surviving herbal to list ginseng is the Shennong Bencao Jing, compiled in the Han period around the first to second century CE and traditionally dated to about 196 CE. It places the root in the top class of herbs that calm the spirit, settle the five organs, brighten the eyes, open the mind, and extend life with long use. Later writers added that the root rebuilds qi, and Li Shizhen's Compendium of Materia Medica of 1596 called it a superior tonic for people worn down by long illness rather than a cure for everything. ^[19]

Wild ginseng from Manchuria became an imperial treasure. Demand from the court and from the trade drained the forests of Liaodong by the sixteenth century, control of the ginseng mountains became a border issue between Ming China, the Jurchen, and Korea, and the Qing emperors, whose Manchu ancestors had traded ginseng, later licensed gathering in the Changbai forests. The old practice of removing the rhizome before use rests on a Song period text that claimed the neck caused vomiting; modern tests found no such effect, and the Chinese pharmacopoeia has included the rhizome with the root since 2005. ^[19][21]

Korea

Korea has supplied ginseng to China for at least fifteen centuries. A sixth century Chinese materia medica, the Mingyi Bielu, records ginseng from Baekje, and the Samguk Sagi says that King Muryeong of Baekje sent ginseng to the Liang court in the early 500s. Through the Goryeo period, from 918 to 1392, Korean ginseng travelled to China in exchange for silk and books, and the state and later the Joseon court treated the root as a diplomatic gift. ^[8][19]

Ginseng was the leading tribute item that Joseon sent to the Ming emperors. The envoys first carried peeled and dried white root, then raw root after 1602 at the Ming court's request, and then pasam, boiled and dried root, which Joseon was exporting before the Jurchen leader Nurhaci is usually credited with inventing it. Each mission carried tens of geun of root for the emperor and smaller amounts for the heir, and the trade became so valuable that Korea restricted private export and punished smuggling. ^[21]

Korean cultivation grew out of these pressures. Transplanting of wild seedlings is recorded in the Goryeo period, and seed based farming spread in the fifteenth and sixteenth centuries, with the Punggi fields of 1541 and the Geumsan system both dating from this era. By the seventeenth and eighteenth centuries licensed growers in Gaeseong supplied the China trade, red ginseng became the export standard, and in 1899 the Korean Empire created the Samjeonggwa to run a red ginseng monopoly. Korean ginseng culture, including cultivation, processing, and the customs around the root, became National Intangible Heritage in 2020. ^{[8][18][19][65]}

Japan

Japan bought so much Korean ginseng through Tsushima in the seventeenth and early eighteenth centuries that silver drained out of the country. Shogun Tokugawa Yoshimune set out to grow it at home, obtained seed through Tsushima, and had scholars such as Tamura Ransui raise the plant from 1737; it took more than ten years to succeed, and Tamura's manual Chōsen ninjin kōsakuki spread the method. Japan has grown the plant in small quantities ever since. ^[22]

Europe and the Americas

The Jesuit cartographer Pierre Jartoux saw ginseng harvested in Manchuria while mapping the region for the Kangxi emperor. His letter of April 1711 described the plant, its root, its price, and its reputation, and the Royal Society printed an English version in 1713 with his drawing. The letter suggested that similar forests in Canada might hold the same plant, and in 1716 another Jesuit, Joseph-François Lafitau, found American ginseng near Montreal and published the discovery in 1718, which opened a trade in Canadian and later Appalachian roots to China that continues today. ^[19][20]

European botany caught up in the nineteenth century. Meyer named the Asian species in 1842, Russian explorers of the Ussuri region reported the wild plant, and the Soviet pharmacologist Israel Brekhman studied the root in the 1950s and 1960s as the model for his idea of an adaptogen, a substance that raises resistance to stress. Western interest in supplements grew from the 1970s, and today the plant is studied in trials across Europe, North America, and Asia. ^[30][32]

In Chinese medicine ginseng, ren shen, is the chief tonic for qi. Physicians prescribe it for exhaustion, weak digestion, poor appetite, shortness of breath, and recovery after illness or blood loss, and they describe it as warm and sweet in nature. The classic preparations are a decoction of 3 to 9 g of dried root, or a larger single dose of up to 30 g in the emergency formula Dushen Tang, and the root anchors formulas such as Sijunzi Tang (Sagunja tang in Korea) for digestion and energy and Guipi Tang for mind and sleep. ^[19][30]

Korean medicine, hanbang, uses the root in the same way and prefers red ginseng as the warmer form. In the Sasang constitutional system doctors match ginseng to body types that need warming, and avoid it in types that run hot. Koreans also take the root as food, which is why Korean law has treated red ginseng as a health functional food since 2004 rather than only as a medicine. ^[12][19]

In Japan the root is part of Kampo medicine under the name ninjin in formulas such as Ninjin'yoeito for weakness after illness. In the Russian Far East, where the wild plant grows, local gatherers used it as a restorative and the Soviet adaptogen school built on that use. Across East Asia the root is also given as a gift at weddings, birthdays, and recoveries as a wish for long life. ^[22][30][65]

Ginsenosides

The signature compounds are ginsenosides, triterpene saponins that are almost unique to the genus Panax. By 2024 researchers had catalogued 271 saponins from the plant and its steamed products, including 243 from the raw plant, 103 from red ginseng, and 65 from black ginseng. Nearly all are dammarane type, with a four ring skeleton carrying sugars, and a few are oleanane type, such as ginsenoside Ro. ^[24][25]

The dammarane ginsenosides fall into two classes. Protopanaxadiol (PPD) ginsenosides carry sugars at carbon 3 and carbon 20 and include Rb1, Rb2, Rc, Rd, Rg3, and Rh2. Protopanaxatriol (PPT) ginsenosides carry an extra hydroxyl at carbon 6 and include Rg1, Re, Rf, Rg2, and Rh1. The ratio of Rg1 to Rb1 helps tell species apart: Asian ginseng carries relatively more Rg1 and contains Rf, while American ginseng is dominated by Rb1 and lacks Rf. A third small group, the ocotillol type, is typical of Vietnamese ginseng. ^[24][25]

Total ginsenosides make up roughly 2 to 6 percent of the dry root, with higher levels in the fine lateral roots than in the main body, and the amount rises with age up to six years. Leaves and stems hold more ginsenosides by weight than the root, and berries carry a pattern rich in Re. The plant builds these molecules through the mevalonate pathway: squalene is cyclised to dammarenediol, cytochrome P450 enzymes add hydroxyls, and glycosyltransferases attach the sugars. ^[4][24][25]

Compound K and the gut

Swallowed ginsenosides are large and poorly absorbed. Gut bacteria such as Bifidobacterium and Bacteroides strip off sugars, turning PPD ginsenosides into compound K and Rh2 and PPT ginsenosides into Rh1 and protopanaxatriol. These smaller molecules enter the blood and show stronger anti inflammatory, anti tumour, and neuroprotective actions than their parents, and the amount of compound K in a person's blood after ginseng tracks the activity of their own gut flora. This is why fermented ginseng products and probiotics are an active area of product development. ^[26]

Gintonin

Gintonin is a complex of lysophosphatidic acids bound to ginseng proteins, isolated in 2012. It activates lysophosphatidic acid receptors on cells with high affinity and raises intracellular calcium, and animal studies link it to memory, blood brain barrier transport, and nerve protection. It is a separate class of active ingredient from the saponins and is not measured in standard ginsenoside assays. ^[27]

Polysaccharides, polyacetylenes, and others

Ginseng roots contain 5 to 10 percent polysaccharides, including acidic pectin like polymers and the panaxans, a set of glycans first isolated in the 1980s that lowered blood sugar in animals. Red ginseng polysaccharides are mostly acidic and are studied for their effects on natural killer cells, macrophages, and cytokines. Polyacetylenes such as panaxynol (falcarinol) and panaxydol are oily compounds with antimicrobial and cell growth effects, peptides and arginine rich amino acids make up part of the free nitrogen, and the root also carries sterols, flavonoids, essential oil terpenes such as β elemene, and the Maillard amino sugars that form during steaming. ^[13][28]

Ginseng is the model adaptogen. In cell and animal studies it moderates the hypothalamic pituitary adrenal stress axis, raises production of protective heat shock proteins, and lowers the surge of cortisol and nitric oxide that follows stress, which together fit the traditional idea of a tonic that steadies the body under load. ^[30]

Many of its measurable actions run through inflammation and oxidation. Ginsenosides switch on the Nrf2 pathway that drives antioxidant enzymes and damp the NF κB pathway that drives inflammatory cytokines. In immune cells, ginsenosides and polysaccharides raise natural killer cell activity and phagocytosis and push macrophages toward a repair state. ^[25][28][69]

In the circulation ginsenosides raise nitric oxide release from the lining of blood vessels, which relaxes arteries and underlies the effects on erectile function and blood flow, and they reduce platelet adhesion in the laboratory. Rb1 and Rg1 protect nerve cells in models of stroke and dementia, Rb1 binds oestrogen receptors weakly, Rg3 slows tumour cell growth and new vessel formation, and compound K is the main active metabolite in the blood. Hair follicle studies show that red ginseng extract and Rb1 stimulate dermal papilla cells and oppose the androgen signalling that drives pattern hair loss. ^[26][69]

The plant is a textbook example of chemistry changed by processing. Steaming and gut bacteria both convert the big, inert ginsenosides into Rg3, Rh2, and compound K, and that is why red ginseng and fermented ginseng are often the forms tested in trials. For a plain language walk through of these mechanisms see what Panax ginseng actually does. ^[14][26]

Fatigue and energy

Fatigue is the best studied use and the most consistent. A 2016 review of 12 studies in 630 people found that ginseng supplements reduced fatigue compared with placebo, and a 2023 review of 19 studies in 2,413 people cited by the National Center for Complementary and Integrative Health found a modest benefit for general fatigue. A 2013 trial in 90 people with idiopathic chronic fatigue found that 1 to 2 g a day of a 20 percent ethanol extract for four weeks improved mental fatigue and raised blood antioxidant markers. ^[31][32]

In people with cancer the picture is similar. A 2013 trial of 364 cancer survivors found that 2,000 mg a day of American ginseng for eight weeks eased fatigue, with the largest gains in people still on treatment. A 2017 trial of 127 people with advanced cancer found that 800 mg a day of Asian ginseng extract for four weeks improved fatigue, though placebo improved as well, and a 2023 network review of 5 ginseng studies found that ginseng relieved cancer related fatigue with fewer side effects than methylphenidate. Our guide to ginseng for energy covers how people use it day to day. ^[43][44][45]

Mental performance and mood

Single doses of the standardised extract G115 sharpen the mind under load. A 2006 study of 27 healthy young adults found that 200 mg of G115 improved speed and accuracy on demanding mental arithmetic over an hour of testing and lowered blood glucose, and NCCIH notes that Asian ginseng may improve abstract thinking, attention, arithmetic, and reaction time in middle aged adults. In older adults a 2026 review of 9 studies in 617 people with mild cognitive impairment or dementia found higher Mini Mental State scores and better ADAS Cog scores with ginseng, with the clearest gains at about 4.5 g of root a day. ^[31][33][34]

Trials in stressed adults report calmer mood. Red ginseng powder at 200 mg a day for three weeks lowered perceived stress and negative emotion in a 2025 trial of 149 moderately stressed adults, and Korean Red Ginseng blunted the cortisol rise under stress in an eight week trial. Reviews of adaptogens credit these effects to the stress axis actions described above. ^[30][31]

Sexual function

Ginseng has a long reputation here and the trials back it up. A 2008 review of 7 studies in 349 men found that Korean Red Ginseng more than doubled the chance of improved erections compared with placebo, and a 2021 Cochrane review of 9 studies in 587 men found better erectile function scores, more men able to have intercourse, and no more side effects than placebo. The usual trial dose was 1 to 3 g of red ginseng a day for eight to twelve weeks. See the full guide to ginseng for erectile dysfunction. ^[35][36]

Immunity and winter infections

Ginseng supports the immune system in measurable ways. A 2021 trial of 100 healthy adults found that 2 g a day of Korean Red Ginseng for eight weeks raised T cell, B cell, and white cell counts with no safety signals, and a 2012 trial of 100 healthy volunteers found that red ginseng cut the number of people who caught an acute respiratory illness over twelve weeks from 45 percent to 25 percent. A 2020 review of 10 trials found that Panax ginseng cut the number of seasonal upper respiratory infections by about 30 percent and shortened them by about three days in healthy adults, with the strongest results when it was paired with the flu vaccine. ^[37][38][39]

Blood sugar and lipids

Ginseng helps keep fasting blood sugar in range. A 2014 review of 16 studies in 770 people found that ginseng lowered fasting blood glucose in people with and without diabetes, and a 2022 review of 20 studies in 1,295 people found lower fasting glucose, lower total cholesterol, and lower inflammatory markers in people with prediabetes or type 2 diabetes. A 2019 review of 18 studies found that Asian ginseng lowered total and LDL cholesterol in people with features of the metabolic syndrome, with a median dose of 3 g a day over eight weeks. ^[31][40][41]

Exercise and physical performance

Ginseng is popular with athletes, and trials show that it helps most with recovery and perceived effort. The 2016 review above found no change in peak physical performance across 8 studies, so the gains people feel in training come through less fatigue rather than more raw power, and NCCIH agrees that most research does not show better athletic performance. ^[31][32]

Menopause

A 2016 review of 10 studies found that ginseng improved sexual function in postmenopausal women and that Korean Red Ginseng improved sexual arousal and total hot flash scores, with no effect on hormones or on the lining of the womb. Trials with the extract G115 also reported better mood and general wellbeing in this group. ^[42]

Cancer prevention and other areas

A prospective study of 4,634 Korean adults over 40 followed from 1987 to 1992 found that regular ginseng users had less than half the cancer risk of non users, with the strongest links for stomach and lung cancer and for fresh root and red ginseng extract, and a later placebo controlled trial of 643 people with chronic gastritis in China found fewer cancers over eleven years in those given red ginseng extract weekly for three years. Smaller trials report better blood flow in healthy adults, less liver damage from alcohol in animal models, and benefits in hair growth and skin ageing. The general guide to ginseng benefits summarises these findings for readers. ^[46][47]

Trials use three kinds of dose. Standardised white ginseng extracts such as G115, which carry 4 percent ginsenosides, are given at 200 to 400 mg a day, usually as one or two 100 mg capsules, for four to twelve weeks. Korean Red Ginseng is given as 1 to 3 g of root powder or extract a day, often as 3 g in three divided doses, for eight to twelve weeks. Decoction style doses of 3 to 9 g of dried root a day appear in traditional use and in some Asian trials. ^{[31][33][36][48]}

The European Union herbal monograph, revised in 2024, allows 600 to 2,000 mg of powdered white root a day, or 1 to 2 g of cut root as a tea two or three times daily, or 200 to 670 mg of a dry ethanol extract a day, for symptoms of tiredness and weakness, with use limited to three months and a doctor's visit if symptoms last more than two weeks. Most benefits in trials appear after two to four weeks. The site guides on ginseng dosage, the best time to take ginseng, and how long ginseng takes to work go into practical detail. ^[48]

Ginseng has a long record of safe use. Randomised trials report side effects at about the same rate as placebo, and the ones that occur are mild: trouble sleeping is the most common, followed by headache, upset stomach or diarrhoea, nervousness, and a small rise in blood pressure or heart rate. Taking it early in the day and keeping to trial doses avoids most of these. NCCIH regards short term use of up to six months as safe for most adults. ^[31][36][50]

Very large amounts taken for a long time can cause trouble. In 1979 a Los Angeles psychiatrist described a "ginseng abuse syndrome" of high blood pressure, nervousness, sleeplessness, skin eruptions, and morning diarrhoea in 14 of 133 people who had taken about 3 g or more a day for up to two years, often with coffee; the report shaped the safety advice that followed. Case reports since then describe breast tenderness, vaginal bleeding after menopause, gynaecomastia, allergic rash, a possible case of Stevens Johnson syndrome, and mood changes in heavy users, and overdose with concentrated liquid can bring palpitations, dry mouth, tremor, and insomnia. Reviews of randomised trials find no change in liver enzymes at usual doses, and the liver injury in a few case reports arose when ginseng was combined with other drugs. ^[49][50]

Pregnancy and breastfeeding call for caution. One ginsenoside caused birth defects in animal tests, there are no safety data in pregnancy or lactation, and the EU monograph, NCCIH, and the LactMed database all advise against use in these periods and in children. People with autoimmune disease, bleeding disorders, hormone sensitive cancers, or unstable blood pressure should talk to a doctor first, and surgeons ask patients to stop ginseng two weeks before an operation. ^[31][48][51]

The most important drug interaction is with warfarin. A 2004 randomised trial in 20 healthy volunteers found that two weeks of American ginseng lowered the INR and the blood level of warfarin, and case reports describe the same fall in people on long term warfarin, so anyone on this drug needs their INR checked if they start or stop ginseng. Ginseng can add to the glucose lowering of diabetes medicines, it may boost the effect of sedatives and caffeine, a case of mania was reported with the MAO inhibitor phenelzine, a case of liver injury occurred with imatinib, and interactions with lamotrigine and with the transplant drugs cyclosporine and tacrolimus have been proposed. A 28 day study in 12 volunteers found that 1 g a day of ginseng induced the liver enzyme CYP3A4, which handles many drugs, and the EU monograph lists no proven interactions at traditional doses. ^{[48][50][52][53]}

Quality is the other safety issue. A 2021 review of 507 ginseng products from 12 countries found that 24 percent were adulterated with the wrong species, with leaves instead of root, or with fillers. Some "ginseng" products sold for male stamina, such as ginseng chocolates, have been found by the US Food and Drug Administration to contain hidden sildenafil or tadalafil, which can cause dangerous drops in blood pressure in people taking nitrates. In the United States ginseng is a dietary supplement under the 1994 DSHEA law, the FDA has not approved it to treat any disease, and the agency sends warning letters to sellers who claim it does. Buying from makers who test identity and ginsenoside content, as described in how to choose a ginseng supplement, avoids these problems, and the ginseng side effects guide covers the cautions in more depth. ^[54][55]

In Europe the dried root is registered as a traditional herbal medicine for tiredness and weakness, and the European Food Safety Authority has judged a ginseng root tincture safe as a flavouring in feed for horses, dogs, and cats, while an earlier dry extract application failed because the maker could not fully describe its composition. Korea's Ministry of Food and Drug Safety sets minimum ginsenoside levels and contaminant limits for red ginseng health foods. ^[48][57][70]

Forms of Panax ginseng

Fresh, white, red, taegeuk, black, and sun ginseng are all the same root at different stages of heat. White ginseng keeps the raw profile rich in Rb1 and Rg1 and is cheaper to make. Red ginseng trades some of those for Rg3 and the other heat formed ginsenosides, keeps for years, and dominates the Korean market, where it makes up about 59 percent of ginseng sales. Black and sun ginseng push the same change further and are sold as premium extracts. ^{[12][13][14][16]}

Related species and plants called ginseng

Plant	Family and native range	What it contains	Use and notes
Panax ginseng (Asian, Korean, Chinese ginseng)	Araliaceae; Korea, northeast China, Russian Far East	PPD and PPT ginsenosides with high Rg1 and Rf; gintonin; polysaccharides	Warming qi tonic; red and white ginseng; the subject of this article [1][25]
Panax quinquefolius (American ginseng)	Araliaceae; eastern North America from Quebec to Georgia	Dominated by Rb1, no Rf; cooler profile	Native American medicine; exported to China since the 1700s; farmed in Wisconsin and Ontario; wild roots on CITES Appendix II since 1975; see Korean versus American ginseng [12][19][43]
Panax notoginseng (sanqi, tianqi, South China ginseng)	Araliaceae; Yunnan and Guangxi, northern Vietnam	High saponins including notoginsenosides; more polyacetylenes and oil than P. ginseng	Chinese remedy for bleeding, bruising, and circulation; 2n = 24; grown in Yunnan [58]
Panax japonicus (Japanese ginseng, zhujieshen)	Araliaceae; Japan, China, Himalaya	Oleanane chikusetsusaponins rather than dammarane ginsenosides	Bamboo like rhizome used in Kampo and Chinese medicine; studied for anti tumour effects [59]
Panax vietnamensis (Vietnamese or Ngoc Linh ginseng)	Araliaceae; central Vietnam at 1,800 to 2,500 m	Ocotillol type majonoside R2 plus dammarane ginsenosides	Southernmost Panax; found in 1973; critically endangered; hill tribe anti fatigue remedy [24]
Eleutherococcus senticosus (eleuthero, formerly "Siberian ginseng")	Araliaceae; Russian Far East, northeast China	Eleutherosides (lignans, coumarins); no ginsenosides	Woody shrub; Soviet adaptogen; EU registered for tiredness; the name "Siberian ginseng" is banned on US labels since 2002 [56][60]
Withania somnifera (ashwagandha, "Indian ginseng")	Solanaceae; India	Withanolides	Ayurvedic rejuvenator; unrelated to Panax [61]
Pfaffia glomerata and P. paniculata (suma, "Brazilian ginseng")	Amaranthaceae; Brazil	Ecdysteroids such as 20 hydroxyecdysone	South American tonic root; unrelated to Panax [62]

Other plants sold under the ginseng name include Angelica sinensis (dong quai, "female ginseng"), Codonopsis pilosula (dangshen, "poor man's ginseng"), Gynostemma pentaphyllum (jiaogulan, "five leaf ginseng"), Lepidium meyenii (maca, "Peruvian ginseng"), Kaempferia parviflora ("Thai ginseng"), Oplopanax horridus (devil's club, "Alaskan ginseng"), Pseudostellaria heterophylla ("prince ginseng"), Schisandra chinensis, Trichopus zeylanicus ("Kerala ginseng"), Eurycoma longifolia (tongkat ali, "Malaysian ginseng"), and the ornamental Ficus microcarpa ("ginseng ficus"). None of them makes ginsenosides. ^[55][56]

Ginseng is one of the most valuable crops by weight in the world. A Korea Ginseng Corporation review of the 2009 market counted about 80,000 tonnes of fresh root a year, more than 99 percent of it from four countries: China with 44,749 tonnes, South Korea with 27,480, Canada with 6,486, and the United States with 1,054. The same review put the world market for roots and products at about 2.1 billion US dollars, with South Korea the largest market at 1.1 billion, Hong Kong the biggest root importer, and Canada the biggest root exporter. By 2013 global sales were above 2 billion dollars, with about half from Korea, and ginseng was traded in 35 countries. ^[12]

All of Korea's crop is Panax ginseng, while China grows P. ginseng, P. notoginseng, and, recently, American ginseng, and Canada and the United States grow almost only American ginseng. On a dry weight basis each of the two main species now amounts to about 7,000 tonnes a year, with China growing about 70 percent of the Asian species. China's output passed 90,000 tonnes of fresh root in 2023, Jilin province grows about 60 percent of that and about 40 percent of the world's ginseng, and the province's ginseng industry was worth about 70 billion yuan in 2023. ^[12][63]

Korea leads in processed products and in red ginseng, where it makes most of the world's supply. Korea exported about 398 tonnes of ginseng roots worth about 92 million dollars in 2023, and the Korean Red Ginseng market alone is estimated at several hundred million dollars a year, with exports rising as domestic demand matures. Market research firms put the world ginseng market at several billion dollars in the mid 2020s, with Asia accounting for about 70 percent of consumption, and they expect growth of about 4 to 5 percent a year. ^[12][17][64]

Wild roots are a separate luxury market. Old Changbai roots sell by the gram at prices far above gold, a hundred year old root fetched 1.68 million yuan at a Ji'an auction, and record roots have sold for millions of yuan. Wild American roots sell for hundreds of dollars a dry pound in Appalachia, and wild simulated roots from both continents command several times the price of field roots. ^[63][64]

Wild Panax ginseng is endangered across its range. Overharvesting since at least the sixteenth century, poaching, logging, and forest fragmentation have cut the wild stands to a small fraction of their former extent, and climate warming is expected to shrink suitable habitat further. Genetic surveys of the ten remaining Russian populations show them to be isolated and depleted, and the species is listed in the Red Data Book of Primorsky Krai. ^[9]

Trade is controlled by treaty and by law. In 2000 the Russian Federation listed its population on CITES Appendix II, with an annotation covering whole and sliced roots and parts of roots but not finished products such as powders, pills, extracts, teas, or confectionery; the listing covers only the Russian population. China placed the whole genus Panax in Class II of its national list of key protected wild plants in 2021, which means that collecting or selling wild roots needs provincial permission, and the state forestry administration has set up reserves and cultivation support in Jilin. Korea protects wild stands in mountain reserves and promotes mountain cultivated ginseng as a substitute. ^[10][11]

Farming has taken the pressure off the forests. More than 90 percent of the ginseng in trade is cultivated, pharmacopoeial monographs and DNA barcoding let buyers check species and origin, and certification schemes for wild simulated and forest grown roots give landowners a reason to keep forests standing. The American species is also on CITES Appendix II, and the United States limits wild harvest to mature plants in the autumn in 19 states. ^[10][55]

Ginseng is a symbol of health, long life, and national identity in Korea. Koreans call it bullocho, the herb of immortality, and manbyeongcho, the herb for ten thousand diseases, and the root appears in folk painting, crafts, and poems. Families give boxed roots and red ginseng extract at weddings, to new parents, and to elders, and the state gives top grade roots to visiting leaders in a custom that goes back to the Joseon tribute missions. ^[21][65]

Manchurian folk tales tell of ginseng spirits that walk the forests as children with braided hair tied in red ribbons. In the stories a ginseng child comes to play with a village child; if an adult ties a red thread to its foot, the child vanishes, and the thread leads to a blade of grass above a buried root. Korean simmani still make offerings to the mountain spirit before they dig, and dreams of a child or an old man are read as signs of a root nearby. ^[19][65]

Food carries the root into daily life. Samgyetang is a whole young chicken stuffed with glutinous rice, garlic, jujube, chestnut, and a fresh ginseng root, simmered in a light broth and eaten on the hottest days of summer to restore strength. Ginseng also goes into side dishes and soups, into insam cha tea with honey, into insam twigim fritters, into candied slices, into insam ju and sansam ju liquors steeped in soju, and into modern energy drinks, lattes, and sweets. Ginseng leaves are eaten fresh or cooked with chicken, ginger, dates, and pork in Chinese home cooking. ^[66][67]

Festivals mark the harvest. The Geumsan Insam Festival has run every autumn since 1981 around the Geumsan market, which handles about 80 percent of Korea's ginseng trade, and Yeongju holds the Punggi Ginseng Festival each October. Jilin's ginseng towns hold wild ginseng festivals and auctions, and Ji'an and Fusong compete for the title of ginseng capital of China. In 2026 South Korea nominated its ginseng tradition, covering cultivation, processing, rituals, food, and gift giving, for UNESCO's list of intangible cultural heritage. ^{[63][65][66][68]}

The plant also has a scientific culture of its own. The Korean Society of Ginseng publishes the Journal of Ginseng Research, Korea Ginseng Corporation runs a research institute and an experiment station, and China's Jilin Ginseng Academy and the Rural Development Administration in Korea breed new cultivars and study climate resilient farming. Red ginseng features in Korean beauty products and in energy drinks, and cultivation, processing, and the customs around the root are part of Korea's heritage register. ^[5][17][65]

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