Lamberts Biotin 500µg Capsules contain the B vitamin biotin, also known as vitamin B7 or vitamin H. Biotin is essential for the metabolism of fats, carbohydrates, and proteins in the body. It plays a crucial role in maintaining healthy skin, hair, and nails, and it is also involved in the production of energy. Biotin deficiency is rare but can lead to symptoms such as hair loss, skin rash, and neurological issues.