1. Bayer Priorin Extra (60caps) - Healthy Hair, Anti Hair Loss The unique composition of Priorin Extra consists of a multitude of ingredients that give visibly richer, stronger and shinier hair. Ingredients / Properties Biotin referred to as the Skin Vitamin, since it helps maintain the health of the skin and skin components (hair and nails). Cystine is a sulfur-containing amino acid that is a key building block of keratin, a major component of hair and nails. Millet Extract comes from one of the oldest cultivated plants in the world and contains milliacin and several fatty acids such as oleic acid and linoleic acid.