D-Biotin;Biotin

Biotin, also known as vitamin H or coenzyme R, is a water-soluble B-vitamin (vitamin B7).

It is composed of a ureido (tetrahydroimidizalone) ring fused with a tetrahydrothiophene ring. A valeric acid substituent is attached to one of the carbon atoms of the tetrahydrothiophene ring. Biotin is a coenzyme for carboxylase enzymes, involved in the synthesis of fatty acids, isoleucine, and valine, and in gluconeogenesis.

1. Biotin is the essential Nutrients of the retina, the Biotin deficiency could  cause the Dry eyes, keratization, inflammation, even blindness.
2. Biotin can improve the body's immune response and resistance.
3. Biotin deficiency will cause reproductive functions recession, bad bone growth and the obstruction of embryo and early childhood growth.