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Benefits and uses of B-complex vitamins

Medically reviewed by Alan Carter, PharmD on April 2, 2019 — Written by Jennifer Berry

Vitamin B complex

Dosage

Benefits and uses

Who should take them?

Side effects and risks

Choosing supplements

Interactions

Foods

Summary

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Vitamin B refers to not one, but eight different vitamins. All B vitamins play a role in converting food into energy in the body. Each vitamin also has a unique role in a person’s health.

Vitamin B-complex supplements include all of the essential B vitamins in one pill. Some contain 100 percent of the recommended daily allowance (RDA) of every B vitamin. Others contain higher doses of some or all of these vitamins.

Many people get all the vitamin B they need from a varied, healthful diet, but others benefit from taking a vitamin B-complex supplement.

