It supplies the hair with nutrients, including millet extract, the amino acid L-cystine and calcium pantothenate, which in combination has been clinically shown to stimulate and improve hair growth and hair re-growth. PRIORIN also contains the nutrient biotin, which helps to maintain healthy hair. PRIORIN helps to improve hair growth by supplying the hair with nutrients, including: Millet Extract - PRIORIN capsules contain millet extract, a source of the phytosterol miliacin, which increases proliferation and metabolic activity in human keratinocytes (key cells in hair). Calcium Pantothenate - The essential vitamin calcium pantothenate stimulates metabolic activity in human keratinocytes (key cells in hair) and is thus important in the nutritional support of normal hair growth and quality. L-cystine - The amino acid L-cystine is a building block of the hair substance keratin and thus an important component of the hair. Biotin - Biotin is a vitamin that is vital for the synthesis of the hair substance keratin.