Toxic effects have not been noted for this B vitamin. Excess amounts of pantothenic acid are excreted in the urine.
The Daily Value for pantothenic acid is 10mg. Americans typically consume between 5mg. and 10mg. of pantothenic acid each day and deficiency of this B vitamin is very rare. Pregnancy and breastfeeding slightly increase the body's need for this vitamin. Bacteria in the intestine produce panothenic acid, which is probably available for use by the body.