Vitamin H is a water-soluble vitamin also known as biotin, coenzyme R, and vitamin B7. This vitamin is important for maintaining healthy skin, hair, and nails. It also helps in the metabolism of carbohydrates, fats, and proteins. Other synonyms for vitamin H include vitamin B8 and vitamin W. Vitamin H is commonly found in foods such as egg yolks, liver, nuts, and milk. It can also be obtained through supplements. A deficiency in vitamin H can lead to hair loss, dry skin, and fatigue. Including vitamin H in your diet is crucial for overall health and well-being.