For healthy hair, skin and nails, you need biotin – a vital nutrient that plays an important role in energy supply to cells and improves fatty acids metabolism. The Number 1 Beauty Supplement throughout the globe. Swanson Biotin belongs to the family of B-vitamin complex. It is a key substance necessary to the function of fatty acid metabolism enzymes which also promotes the supply of energy to the cells. Biotin’s strengthening effects on the hair and scalp has led to its wide acceptance as the “Number 1 Beauty Supplement”.