Pantothenic acid is used in the breakdown of carbohydrates, lipids and some amino acids and is also used in the synthesis of coenzyme A. Biotin is a coenzyme in carboxylation reactions in the body, a carboxylation reaction occurs when a carboxylic acid group (-COOH) is added onto a molecule.
Both these vitamins are produced by bacteria that live in the intestine region of the gastrointestinal track. Thus as expected it is unknown to suffer from Pantothenic acid deficiency, but biotin deficiency is possible. The reason why biotin can become deficient is that avidin, found most commonly in eggs ties up the body's biotin and makes absorption difficult. The result is a disease called scaly dermatitis.