Ingredient Evidence

L-citrulline is an amino acid your body makes on its own and that is also found in watermelon. Human studies point to a modest drop in blood pressure in middle-aged and older adults, a small and …

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Niacin (vitamin B3) is an essential nutrient, and most people in the United States already get more than they need from food. At very high supplement doses, nicotinic acid improves cholesterol and …

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Vitamin E is a group of eight fat-soluble compounds, and only alpha-tocopherol meets human requirements. The amounts in food are well tolerated. In large trials, vitamin E supplements did not prevent …

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Ginger is the underground stem (rhizome) of Zingiber officinale, used as food and as a supplement. Human studies are strongest for nausea in pregnancy and look promising but weaker for menstrual …

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L-carnitine is a compound your body makes and also gets from food, especially red meat, and it helps move fatty acids into your cells' energy-producing mitochondria. Human studies show small to …

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Magnesium is an essential mineral that helps run more than 300 enzyme systems, including muscle, nerve and heart-rhythm function. Human studies support its use in a few specific, mostly …

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