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How likely are Americans to be deficient in vitamins or minerals?

Read info based on the CDC about vitamin deficiencies such as vitamin A, B-6, B-12, C, D, and E, folate, and iron in the United States.

Vitamin Deficiency in Men and Women -- doctor's clipboard with information about vitamin deficiency

Can supplements with antioxidants like beta-carotene and vitamins A and E cause you to die sooner?

Learn more about antioxidants like beta-carotene, vitamin A, vitamin E, and their effect on mortality, or premature death.

Can Antioxidants Cause You to Die Sooner? -- antioxidant supplements and carrots

Is it true that vitamin D can increase the risk of prostate cancer in men?

Information on the potential link between vitamin D and prostate cancer, based on a clinical study.

Vitamin D & Prostate Cancer Risk -- bottle of vitamin D capsules

Which vitamins and minerals should be taken together or separately?

Find out the best way to take vitamins and minerals and which vitamins and minerals should be taken together or separately for proper absorption. ConsumerLab answer explains the best way to take vitamins and minerals.

Vitamins & Minerals That Should Be Taken Together or Separately -- various vitamins in spoons

Does the FDA approve laboratories that test supplements?

Are there FDA approved & registered laboratories for dietary supplements? Learn more about laboratories that are registered with the FDA.

Does the FDA Approve Laboratories That Test Supplements? -- supplement capsules in glassware in laboratory

Do companies have to test supplements before they are sold?

Learn more about the requirements supplement companies are held to and FDA regulations.

Do Supplement Companies Have to Test Their Products? -- supplements in glassware in laboratory

Should I be concerned about supplements that contain Polysorbate 80? Is it safe?

Find out if polysorbate 80 is a safe ingredient in supplements.

Is Polysorbate 80 Safe? -- woman looking at supplement label

How can I find supplements that are gluten-free on ConsumerLab.com?

Gluten-Free supplements & vitamin information including other dietary features like vegetarian, vegan, and kosher on ConsumerLab.com. Our answer explains.

Finding Gluten-Free Supplements -- gluten-free seal

Is fish oil safe? Is it contaminated with mercury and PCBs?

Fish oil safety, including information on contamination with mercury and PCBs.

Is Fish Oil Safe? -- fish oil capsules up close

What is the difference between forms of vitamin K2?

Learn about the different forms of vitamin K2 - MK-4 (synthetic) and MK-7 (natural, from natto).

Vitamin K: MK-4 vs MK-7 -- vitamin K tablets in the shape of the letter 'K'
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