What is Vitamin B7?

Biotin, or Vitamin B7, is used in the body in cell growth, the production of fatty acids, metabolism of fats, and amino acids. It plays a role in the process in which energy is generated during aerobic respiration. Biotin is also helpful in maintaining a steady blood sugar level.

It is also found in many cosmetic and health products for the hair and skin as it can be useful in strengthening hair and nails.

Deficiency is extremely rare, as intestinal bacteria generally produce in excess of the body's daily requirement. For that reason, statutory agencies in many countries do not prescribe a recommended daily intake.

Hair loss

Biotin supplements are often recommended as a natural product to counteract the problem of hair loss in both children and adults. There are, however, no studies that show any benefit in any case where the subject is not actually biotin deficient. The signs and symptoms of biotin deficiency include hair loss which progresses in severity to include loss of eye lashes and eye brows in severely deficient subjects. Some shampoos are available that contain biotin, but it is doubtful whether they would have any useful effect, as biotin is not absorbed well through the skin.

Cradle cap (seborrheic dermatitis)

Children with a rare inherited metabolic disorder called phenylketonuria (PKU; in which one is unable to break down the amino acid phenylalanine) often develop skin conditions such as eczema and seborrheic dermatitis in areas of the body other than the scalp. The scaly skin changes that occur in people with PKU may be related to poor ability to use biotin. Increasing dietary biotin has been known to improve seborrheic dermatitis in these cases.

Diabetes

People with type 2 diabetes often have low levels of biotin. Biotin may be involved in the synthesis and release of insulin. Preliminary studies in both animals and people suggest that biotin may help improve blood sugar control in those with diabetes, particularly type 2 diabetes.