Vitamin B7

Vitamin B7, also known as biotin, vitamin H or vitamin B8, is a water-soluble vitamin, required by all organisms. There are eight different forms of biotin, but only one of them, D-biotin, occurs naturally and has full vitamin activity. Biotin can only be synthesized by bacteria, molds, yeasts, algae, and by certain plant species (1, 2).

Health functions

In humans, vitamin B7 (biotin) is the coenzyme attached at the active site of five enzymes known as ‘carboxylases’ (3).

Disease risk reduction

Research indicates that vitamin B7 (biotin) is broken down more rapidly during pregnancy and that biotin nutritional status declines during the course of pregnancy (6, 8, 9).

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Things to know about Vitamin B7

  • Other Applications

    Research suggests that vitamin B7 (biotin) can improve glucose utilization, which is impaired in diabetes mellitus.

  • Intake Recommendations

    Only little is known regarding the amount of dietary biotin required to promote optimal health or prevent chronic disease.

  • Supply Situation

    National nutrition surveys for some European countries have shown estimated mean dietary vitamin B7 (biotin) intakes for adults of 36 micrograms (mcg)/day (26).

  • Deficiency

    Vitamin B7 (biotin) deficiency is very rare, and can be measured by several indicators (4, 29, 30, 31).

  • Sources

    Vitamin B7 (biotin) is found in many foods, but generally in lower amounts than other water-soluble vitamins. Egg yolk, liver, and yeast are rich sources of biotin.

  • Safety

    Vitamin B7 (biotin) is not known to be toxic.

  • References

    Consult the full list of scientific references.