Vitamin D Supplements Explained by ConsumerLab's Dr. Tod Cooperman

Find out when you need a vitamin D supplement (and when you don’t) as well as the form, type, and dose of vitamin D that is best from Tod Cooperman, M.D., the president of

Learn which vitamin D supplements failed our quality ratings and which passed — including combinations with calcium, magnesium and/or vitamin K in our Vitamin D Supplements Review

You can find your requirements for vitamin D and other vitamins and minerals using our free tables at

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