Ginseng: Product Forms and How to Choose One
Shoppers looking for ginseng face a confusing shelf: Korean red ginseng, American ginseng, "Siberian ginseng", capsules, teas, tinctures and fizzy drinks. These products are not interchangeable. Our editorial team explains which plant is which, how the forms differ and what to look for on the label.
Which plant is "ginseng"?
True ginsengs belong to the genus Panax. The two most widely used are Asian or Korean ginseng (Panax ginseng) and American ginseng (Panax quinquefolius). Their roots contain ginsenosides, a family of saponins thought to be responsible for most of the biological effects.
The two species differ in their ginsenoside profiles. Asian ginseng is traditionally regarded as more "stimulating", while American ginseng is described as gentler. A review by Szczuka and colleagues highlights that American ginseng tends to contain a higher proportion of certain ginsenosides, which may explain differences in reported effects.
"Siberian ginseng" is a different plant altogether: Eleutherococcus senticosus. It contains eleutherosides rather than ginsenosides and should not be treated as a substitute for Panax species, even though it is often sold on the same shelf.
Before comparing forms, then, the first step is checking the botanical name. If a product does not state the Latin species, that is already a sign of low transparency.
White, red and processed roots
The way the root is processed changes its chemistry. White ginseng is peeled and air-dried. Red ginseng is steamed before drying, which converts some ginsenosides into others and gives the root its reddish colour. Korean red ginseng is the best-known product of this type.
Some newer products use additional heating or fermentation to produce so-called "rare" ginsenosides. These have attracted research interest, but evidence for clear advantages in humans remains limited.
Root age also matters: traditional practice favours roots of four to six years, as ginsenoside content tends to increase with age. Older roots are more expensive, which creates an incentive for mislabelling.
Whole roots and slices are mainly used for teas and traditional preparations. They are attractive for authenticity but make it hard to know how much active compound you are actually consuming.
Comparing the product forms
Ginseng products range from simple powdered root to concentrated extracts. The key difference is standardisation: whether the manufacturer guarantees a defined amount of ginsenosides per dose.
| Form | Advantages | Drawbacks |
|---|---|---|
| Standardised extract (capsules/tablets) | Defined ginsenoside content; used in most clinical trials | Quality depends on manufacturer |
| Powdered root | Closer to traditional use; inexpensive | Content variable; larger amounts needed |
| Liquid extract or tincture | Flexible dosing; fast to take | Often contains alcohol; variable strength |
| Tea | Pleasant ritual | Usually low and unknown dose |
| Energy drinks with "ginseng" | Convenient | Trivial amounts; effects driven by caffeine and sugar |
An analysis of 25 commercial ginseng products by Harkey and colleagues found wide variations in ginsenoside content, with some products deviating substantially from their label claims. Although this study is older, it illustrates why standardisation and independent testing matter.
Many clinical trials have used a standardised Panax ginseng extract, often in doses around 200–400 mg per day. Choosing a product that resembles what was tested makes it more likely that you are taking something comparable.
Quality marks and regulation in the UK
In the UK, ginseng is sold either as a food supplement or as a traditional herbal medicine. Products registered under the MHRA Traditional Herbal Registration (THR) scheme carry a THR certification mark and must meet standards for quality, safety and patient information, although their indications are based on traditional use rather than proven efficacy.
The European Medicines Agency’s Committee on Herbal Medicinal Products has published a monograph on Panax ginseng root, which recognises traditional use for symptoms of fatigue and weakness. This is a useful reference point but not proof of performance-enhancing effects.
- Check the Latin species name and plant part (root).
- Look for a stated ginsenoside percentage or milligrams per dose.
- Prefer THR-registered products or brands with independent testing.
- Avoid products that promise to treat disease or boost hormones.
- Athletes should use batch-tested products to reduce contamination risk.
Price is not a guarantee of quality, but suspiciously cheap "red ginseng" often contains little active material.
Who should be cautious
Ginseng is generally well tolerated in short-term use, but it is not suitable for everyone. Reported side effects include insomnia, nervousness, headache and digestive upset, especially with stimulating Asian ginseng products taken in the evening.
Ginseng can affect blood glucose, so people with diabetes taking glucose-lowering medicines should discuss it with their doctor. There are reports of possible interactions with warfarin, and caution is advised with antidepressants and stimulants.
It is not recommended during pregnancy and breastfeeding, nor for children, because safety data are lacking. People with hormone-sensitive conditions should also seek medical advice.
Many products are recommended for courses of a few weeks followed by a break. This pattern comes partly from traditional practice and partly from the absence of long-term safety data rather than from proven tolerance development.
The editorial team's conclusions
Choosing ginseng starts with the species: Panax ginseng, Panax quinquefolius and Siberian ginseng are different plants with different chemistry.
Standardised extracts give the most predictable dose and most closely match what has been studied. Teas and energy drinks are rarely a meaningful source.
In the UK, a THR mark or independent testing offers extra reassurance about quality.
We also recommend our articles on the evidence for ginseng in sport, on adaptogens in general, and on how to spot unreliable herbal supplements.
References
- Kim JH. Pharmacological and medical applications of Panax ginseng and ginsenosides: a review for use in cardiovascular diseases. J Ginseng Res. 2018;42(3):264–269.
- Harkey MR, Henderson GL, Gershwin ME, Stern JS, Hackman RM. Variability in commercial ginseng products: an analysis of 25 preparations. Am J Clin Nutr. 2001;73(6):1101–1106.
- Szczuka D, Nowak A, Zakłos-Szyda M, Kochan E, Szymańska G, Motyl I, et al. American ginseng (Panax quinquefolium L.) as a source of bioactive phytochemicals with pro-health properties. Nutrients. 2019;11(5):1041.
- Panossian A, Wikman G. Effects of adaptogens on the central nervous system and the molecular mechanisms associated with their stress-protective activity. Pharmaceuticals (Basel). 2010;3(1):188–224.
- European Medicines Agency, Committee on Herbal Medicinal Products. Community herbal monograph on Panax ginseng C.A. Meyer, radix. London: European Medicines Agency.
