Ingredient Evidence

Vitamin C (L-ascorbic acid) is an essential vitamin your body cannot make, and the one benefit that is firmly established is that it prevents and cures scurvy. For everything else, such as colds, …

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Beet root can give you a small boost in some exercise measures, and it lowered blood pressure in one small trial, but it has not been shown to treat or prevent any disease. It is the edible root of …

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Vitamin B12 (cobalamin) is an essential vitamin your body cannot make, and its best-proven benefit is preventing and correcting deficiency. Human trials of B12 for heart disease, thinking and memory, …

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Vitamin B6 is an essential, water-soluble vitamin that your body needs for protein metabolism, brain chemicals and red blood cells. Human studies point to possible help for nausea in pregnancy and …

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Yes, there is human research on ashwagandha (Withania somnifera), a shrub whose root, and sometimes leaf, is used in Ayurvedic medicine. The best-studied uses are stress, anxiety and sleep, where …

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Zinc is an essential mineral your body needs for immune function, wound healing, growth, DNA and protein production, and your sense of taste and smell. Human studies support it most clearly where …

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