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Medical Definition of calcium pantothenate. : a white powdery salt C18H32CaN2O10 made synthetically and used as a source of pantothenic acid.
Pantothenic acid, also known as Vitamin B5, and Pantothenate is a water-soluble vitamin from the B group of vitamins. Water soluble means that this vitamin dissolves in water. It runs through the bloodstream and is excreted in urine. We do not store it and need to consume it every day to replenish supplies.