Ginseng is amongst the most widely-used herbs in the world. ​It seems to be effective at boosting mood, improving immunity, and increasing cognition. But does it interact with testosterone? Here’s what the research has to say:

• 60 infertile men were randomly assigned to receive either 3g of ginseng or placebo for 12 weeks. ​The subjects supplementing with ginseng were found to have improved markers of penile performance, but testosterone levels remained the same across both groups (22).
• In men with poor sperm mobility, ginseng supplementation was able to increase testosterone levels (23).

Although ginsengs interaction with testosterone is unreliable, it is a proven nitric oxide booster. This means that it has been shown to dilate the blood vessels and improve blood flow.

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