Vitamin B5, also known as pantothenic acid, is a water-soluble nutrient necessary for various metabolic functions within the body. This essential vitamin participates in energy generation, synthesizing hormones, and maintaining optimal conditions for skin, hair, and nails.2Vitamin B5 (pantothenic acid) has many uses, including supporting energy production, making red blood cells, and synthesizing hormones. It also helps maintain healthy skin, hair, and nails, supports nervous system function, and aids in metabolizing fats, proteins, and carbohydrates.