Adrenal gland function, as well as the synthesis of cortisol, is dependent on an adequate supply of various vitamins. Vitamin C levels are among the highest in the adrenal glands compared with other organs. Vitamin C plays a major role in neurotransmitter production and supports general health of the adrenals. Under stressful conditions, vitamin C and B complex vitamins are readily used and excreted from the body. Within the B vitamin family, pantothenic acid breaks down into coenzyme A, which is essential for the production of energy from ingested carbohydrates, fats and proteins. In a study evaluating the effects of pantothenic acid and glutathione production, pantothenic acid was found to increase CoA levels in the body, leading to increased energy production. Niacin also plays a vital role in many metabolic functions in the body, including supplying energy to cells and assisting in the production of adrenal hormones.