Ginseng

Although there are several species of ginseng, Panax or Asian ginseng (Panax Ginseng) is commonly used today to enhance physical and mental well being, and increase stamina. Ginseng contains ginsenosides, essential oils, and phytosterols. Studies evaluating ginseng's effect on stamina and well being have suffered from poor design and conflicting results. Side effects include: insomnia, palpitations, hypertension, hypotension, anorexia, headache, vertigo, and mania. 

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