Vitamin B5, or pantothenic acid, is a water-soluble B vitamin found in varying amounts in almost all vegetables, wholegrain foods and meats. Particularly good sources include chicken, beef, eggs, mushrooms and avocado, and some breakfast cereals are fortified with it. Because it is so widespread, most people get all they need from their daily diet, but the body cannot store it, so a regular supply matters.
Pantothenic acid has several functions, including helping the body release energy from food. It contributes to normal mental performance and to the reduction of tiredness and fatigue, which is why it usually sits alongside the other B vitamins in B-complex and energy formulas.
On labels you will usually see calcium pantothenate, a stable form of the vitamin, or pantethine. Amounts are listed in milligrams (mg), and you will find pantothenic acid in multivitamins, B-complex products and some single-nutrient supplements. If you take a multivitamin and a separate B-complex, the amounts add together, so check the combined total against NHS guidance.