Pantothenic Acid Vitamin B-5 ? 100 mg Pantothenic Acid is often referred to as vitamin B-5. Its bioactive form, coenzyme A, is the starting point of the Krebs energy production cycle. This essential nutrient plays a role in the metabolism of proteins, fats and carbohydrates. It is also a precursor to the key neurotransmitter acetylcholine, necessary for memory and concentration. Each 100 mg tablet contains: Pantothenic Acid (from Calcium D-Pantothenate) 100 mg Suggested Use: 1 tablet daily. From Source Naturals.