Last update: 2.5.2017.

Energy from carbohydrates

Supplement Watch - Vitamin B

Other name(s) for Vitamin B

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General information for Vitamin B

B vitamins play important roles in cell metabolism. They are all water-soluble and although grouped under the same letter 'B' they are chemically very distinct but are often found in the same foods.

Solubility of Vitamin B


All B vitamins are water soluble.

Benefits of Vitamin B

B vitamins are a class of water-soluble vitamins that play important roles in cell metabolism.

Deficiency symptoms / disease

Several vitamin deficiency symptoms/diseases may result from the lack of sufficient B vitamins. See under different B vitamins.

Overdose symptoms / disease

Water-soluble vitamins are generally eliminated in the urine. That is why taking large doses of certain B vitamins usually only produces very small side-effects. These may include e.g. restlessness and nausea. Almost always the side-effects are caused by dietary supplements. It is very hard to get an overdose of B-vitamins from normal food.

FDA information for Vitamin B

(Daily value/Recommended dietary allowance/Adequate intake)

Recommended intakes of nutrients vary by age and gender and are known as Recommended Dietary Allowances (RDAs) and Adequate Intakes (AIs). However, one value for each nutrient, known as the Daily Value (DV), is selected for the labels of dietary supplements and foods. A DV is often, but not always, similar to one's RDA or AI for that nutrient. DVs were developed by the U.S. Food and Drug Administration (FDA) to help consumers determine the level of various nutrients in a standard serving of food in relation to their approximate requirement for it. The label actually provides the %DV so that you can see how much (what percentage) a serving of the product contributes to reaching the DV.

Data from U.S. Department of Health & Human Services, National Institutes of Health, Daily values.

Look under specific vitamin.

Food sources for Vitamin B

Look at indivudial B vitamin for food source information.

External links

Wikipedia-Vitamin B MedlinePlus-Vitamin B