Ginseng – Overview, Health Benefits & Side Effects

Written by
The Manual Team
Medically approved by
Dr Earim Chaudry
Last updated
19th August 2021

In 30 seconds…

Ginseng is a traditional medicine that has been used in China for centuries, and its health benefits are starting to be recognised in the West now, too.

It could potentially improve erectile dysfunction and testosterone levels, and it may aid your immune system, brain function, and energy levels. Not all of these uses are supported by medicinal science, however.

The root of a plant, ginseng is incredibly versatile and easy to add to your diet. You can take it in supplements, but ginseng use can range from something to add to a tea to an ingredient for a stir fry.

And while it’s largely safe, ginseng can have side effects. You may experience trouble sleeping, headaches, and changes to blood pressure and blood sugar levels.

Ginseng is a plant whose root has been used for centuries in traditional Chinese medicine. 

More recently, scientists and consumers have started to pay attention to it in the West too, thanks to its famed health benefits. From a fabled aid to sexual dysfunction to a possible brain power booster, it may prove to be an incredibly useful medicine.

But what is the evidence for ginseng’s health benefits? And are there any side effects? In this article, we’re going to tell you exactly what you can expect from this most popular of herbal remedies.

What is Ginseng?

Ginseng is a plant that comes in different forms, each with different effects, uses, and histories. While American ginseng is often used as a herbal remedy too, it’s typically Panax ginseng that is used and sold. You may well see it referred to as Asian ginseng, Chinese ginseng, or Korean ginseng, yet these are all names for the same plant.

You usually consume the plant’s roots — in teas or supplements, for example — and the purposes for which it’s marketed and sold are wide-ranging. Yet, this is no recent fad: its reputation as a medicinal remedy has been around for a long time. And that’s why it’s called Panax ginseng, a word that comes from the ancient Greek meaning “cure-all”.

Not all of the benefits that are claimed for ginseng are backed by science, however. Let’s take a look at what they are and whether they stack up.

What are Ginseng’s Health Benefits?

As mentioned, ginseng’s uses range widely, with advocates citing the plant’s benefits to your sexual and cognitive health, and even its ability to tackle cancer, flu, and fatigue. However, there have been cases where the plant has been mis-sold, with some supplement vendors being investigated by the US drugs agency, the FDA.

With so much misinformation surrounding ginseng, what should you believe? Here is what the science says about ginseng’s health benefits:

Ginseng and Erectile Dysfunction

Panax ginseng is sometimes described as a “herbal Viagra”. While its reputation for helping with sexual dysfunction seems to be as old as the plant’s medicinal use, this isn’t just wishful thinking. Studies have suggested that ginseng may have a positive impact on erectile dysfunction.

“Herbal Viagra” might be a bit misleading, though. Ginseng has not been licensed for the treatment of ED and the real thing — Viagra itself — will almost certainly work better.

Can Ginseng Boost Your Immune System?

One of the ginseng uses that has been most studied by researchers relates to its possible effect on your immune system. A number of studies have shown reasonably positive results.

One Korean study investigated the effect of ginseng on patients who were recovering from stomach cancer. Following the participants for two years, researchers found that daily consumption of ginseng caused improvements to immune functions and made the chances of recurring symptoms lower.

Another study appeared to confirm that ginseng was helpful for immune system health in cancer patients, suggesting that the root improved immune function generally.

Does it Help the Flu?

Interestingly, while there is evidence that ginseng may be helpful in reducing the risk of influenza, there is not much hope that it is useful after having contracted it, despite what some websites claim.

Another study into the effect of American ginseng on flu symptoms in children showed promising results, too.

Ginseng and Testosterone Levels

Alongside erectile dysfunction, ginseng has been thought to improve sexual function — it was, after all, traditionally used as an aphrodisiac. One review of the medical literature found evidence that ginseng had benefits for sperm count and sperm health, levels of libido, and erectile function.

Studies in rats, meanwhile, have found that ginseng can be useful in boosting testosterone levels. While further studies in humans are needed, ginseng’s effects on many aspects of male sexual health are very promising.

Other Ginseng Uses?

Treating Cancer

Ginseng’s potential effect on cancer risk continues to be explored. However, positive signs are being observed in the research. For example, ginseng may play a role in inhibiting the cycle of cell division associated with the growth of cancer, while another study found that overall cancer risk is significantly lowered by ginseng consumption.

Boosting Cognitive Function

Studies have also made steps toward revealing some of the potential effects of ginseng on brain function, including on mental health, memory, and fatigue. One study, for example, found a positive effect of Panax ginseng on the quality of sustained mental performance.

Other studies have not shown convincing results, however.

How is Ginseng Used?

The ways in which ginseng is sold and consumed vary. Nevertheless, there is no evidence that one method of consumption is preferable to, or more effective than, another. 

You’ll find that ginseng is available online or in outlets around the world in any of the following varieties:

  • As a fresh root: Depending on where you are in the world, you can find ginseng fresh. Ginseng’s uses in cooking are diverse, and the root can be added to soups or stir-fries, or simply fried and eaten.
  • In teas: One of the most popular uses of ginseng is in teas. While you can brew fresh ginseng yourself, many tea brands sell infusions dried and pre-packaged.
  • As a supplement: You may come across all sorts of supplements that contain ginseng. While they can be great for your health, ensure that you buy them from a reliable vendor. There are many “herbal” medicines that contain undeclared ingredients.

Does Ginseng Have Side Effects?

While ginseng is a “natural” medicinal remedy, this does not mean that it’s completely harmless. 

When using ginseng, be careful of the quantities that you’re consuming. According to studies, ginseng use above 15 grams a day may result in severe side effects.

Ginseng’s side effects are usually associated with overuse — either in terms of large doses or with extended usage over the years. Scientific studies suggest that any of the following side effects can be experienced:

  • Headaches
  • Loss of appetite
  • Difficulty sleeping
  • Increased blood pressure
  • Nausea and diarrhoea
  • Tachycardia

Ginseng is also thought to interact with anti-inflammatory medicines, digoxin (a medicine for heart disease), and heparin or warfarin (drugs that thin the blood). Similarly, ginseng should not be taken by diabetics, nor by pregnant women, as it may interfere with oestrogen production.

Key Takeaways

There are many uses and health benefits associated with ginseng. However, not all of them have held up to scientific scrutiny. And with many questionable vendors around, knowing what effects you should expect is essential before you buy.

So, while it promises a lot, use ginseng with caution. It may generally be considered safe, but you should watch out for possible side effects, including headaches, raised blood pressure, and difficulty sleeping.


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  2. Dai-Ja Jang, Myeong Soo Lee, Byung-Cheul Shin, Young-Cheoul Lee and Edzard Ernst (2008). Red ginseng for treating erectile dysfunction: a systematic review:

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  5. The Conversation – Ginseng could be an effective way to prevent the flu:

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  14. University of Rochester Medical Center – Health Encyclopedia:

While we've ensured that everything you read on the Health Centre is medically reviewed and approved, information presented here is not intended to be a substitute for professional medical advice, diagnosis, or treatment. It should never be relied upon for specific medical advice. If you have any questions or concerns, please talk to your doctor.

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