Vitamin B7, also known as biotin, is a water-soluble vitamin that plays a crucial role in the body's metabolism. It helps convert carbohydrates, fats, and proteins into energy, making it essential for maintaining healthy bodily functions. Biotin is also important for the health of skin, hair, and nails. This vitamin can be found in various foods, including eggs, nuts, seeds, and certain vegetables like sweet potatoes. While deficiencies are rare, they can lead to symptoms such as hair loss, skin rashes, and fatigue. Most people can obtain sufficient biotin through a balanced diet.