NOW Biotin 5000 mcg capsules deliver a high-potency, water-soluble B-vitamin vital for supporting energy production, as it plays a key role in the metabolism of fats, carbohydrates, and amino acids. This formula is renowned for promoting healthy hair, skin, and nails, and also contributes to normal immune system function and the synthesis of certain proteins. The supplement is Non-GMO, suitable for vegetarians/vegans, and free from common allergens like wheat, gluten, soy, milk, and tree nuts.