biotin

Biotin (Vitamin H) is a water-soluble B-vitamin and is necessary for cell growth, the production of fatty acids, and the metabolism of fats and amino acids.

Biotin sulfone is a natural metabolite of biotin.

3-Hydroxyisovaleric acid (Beta-Hydroxyisovaleric acid) is an endogenous metabolite excreted in the urine and can serve as an early and sensitive indicator of biotin deficiency.

D-Desthiobiotin is a biotin derivative used in affinity chromatography and protein chromatography, as well as for protein and cell labeling, detection, and separation.

L-Cysteine (L-(+)-Cysteine) is a non-essential sulfur-containing amino acid in humans. L-Cysteine is important for protein synthesis, detoxification, and diverse metabolic functions. Found in beta-keratin, the main protein in nails, skin, and hair, L-Cysteine is important in collagen production, as well as skin elasticity and texture. Also required in the manufacture of amino acid taurine, L-Cysteine is a component of the antioxidant glutathione, and plays a role in the metabolism of essential biochemicals such as coenzyme A, heparin, and biotin.