Calcium pyruvate is the calcium salt of pyruvic acid used in dietary supplements as a source of pyruvate and the essential mineral calcium. Pyruvate, or pyruvic acid, is involved in carbohydrate, fat and protein metabolism in the body 1.
Ensminger AH, Ensminger ME, Konlande JE, Robson JRK. The Concise Encyclopedia of Foods and Nutrition. Boca Raton, Florida: CRC Press, 1995.