B7, commonly known as biotin, is a water-soluble vitamin that plays a crucial role in the metabolism of carbohydrates, fats, and proteins. It is essential for converting food into energy and is involved in the synthesis of fatty acids and glucose. Biotin is naturally found in various foods, including eggs, nuts, seeds, and certain vegetables. Biotin is also important for maintaining healthy skin, hair, and nails. A deficiency in biotin can lead to symptoms such as hair loss, skin rashes, and brittle nails. Most people obtain sufficient biotin through their diet, but supplements are available for those who may need extra support.