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Medical Definition of calcium pantothenate. : a white powdery salt C18H32CaN2O10 made synthetically and used as a source of pantothenic acid.
EWG Risk Score: 2. What is it: Panthenol, aka Provitamin B5 is is the alcohol analog of pantothenic acid (vitamin B 5). This means that it's the metabolic precursor for Vitamin B5; it's inactive until the body metabolizes it.Panthenol is synthesized from a number of sources including honey, molasses, and rice.. What is it: Panthenol, aka Provitamin B5 is is the alcohol analog of pantothenic acid (vitamin B 5). This means that it's the metabolic precursor for Vitamin B5; it's inactive until the body metabolizes it.