Vitamin B7

Biotin Vitamin B7, vitamin H, factor R - Several scholars have described it, only later discovered that it is the same substance) is important for the metabolism of amino acids and fatty acids, is a cofactor for carboxylases.

Source
At low concentrations in many foods. Rich sources are yeast, liver, egg yolk, nuts, lentils. The daily requirement (RDA can not be estimated): 30-60 mg

Deficit
Deficiency of food does not occur. Scientists described the people who long consumed a large amount of raw eggs (irreversibly binds to biotin with avidin contained in raw egg white) and improper parenteral nutrition. Symptoms : seborrheic dermatitis, fatigue, anorexia , nausea ,hypercholesterolemia , vascular disorders.

Surplus
Signs of excess are not known.

Related articles

 * Fat Soluble Vitamins
 * Water Soluble Vitamins