Pyruvic acid-13C (Acetylformic acid-13C) sodium is the 13C-labeled Pyruvic acid. Pyruvic acid is an intermediate metabolite in the metabolism of carbohydrates, proteins, and fats.In Vitro:Stable heavy isotopes of hydrogen, carbon, and other elements have been incorporated into drug molecules, largely as tracers for quantitation during the drug development process. Deuteration has gained attention because of its potential to affect the pharmacokinetic and metabolic profiles of drugs.