Essential vitamin for the health of the hair, skin & nails biotin supplement (also called vitamin B7 or vitamin H). biotin is necessary for cell growth & the production of cellular energy. helps to strengthen the hair, prevent it falling out & stimulate its regrowth. promotes healthy, beautiful, radiant skin. improves the strength & general appearance of the nails. supports nutrient absorption & healthy nervous system function. a ‘beauty vitamin’ with deep-acting effects backed up by multiple scientific studies.