Vitamins, Herbs, and Dietary Supplements

Vitamins, Herbs, and Dietary Supplements

Find evidence-based information on individual ingredients such as herbs, vitamins, minerals, and other dietary supplements. The supplement monographs on RxList include a description, review of effectiveness, how it works, safety concerns, and interactions with medications.

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Featured Supplement: Black Tea


Black tea.Black tea is a product made from the Camellia sinesis plant. The aged leaves and stems are used to make medicine. It  increases urine output, and may reduce the symptoms of Parkinson's disease. It also contains antioxidants and other substances that might help protect the heart and blood vessels.
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