Calcium pyruvate - Does Calcium Pyruvate work? Any side effects?

Calcium pyruvate is formed in the body during digestion of carbohydrates and protein from food. Found in the form of pyruvic acid, pyruvate can be found in various foods including red apples, cheese and red wine. Claims that calcium pyruvate improves metabolism, decreases appetite and aids in weight loss need further study.
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Calcium pyruvate side effects
Calcium pyruvate appears to be relatively safe and no major side effects have been reported in the medical literature as of November 2007.

Calcium pyruvate and exercise training
Effects of calcium pyruvate supplementation during training on body composition, exercise capacity, and metabolic responses to exercise.
Nutrition. 2005 Mar;21(3):312-9. Koh-Banerjee PK, Ferreira MP, Greenwood M, Bowden RG, Cowan PN, Almada AL, Kreider RB. Department of Preventive Medicine, University of Tennessee Medical School, Memphis, Tennessee, USA.
We evaluated the effects of calcium pyruvate supplementation during training on body composition and metabolic responses to exercise.  Twenty-three untrained females took either 5 g of calcium pyruvate or a placebo (PL) twice daily for 30 d while participating in a supervised exercise program. No significant differences were observed between groups in energy intake or training volume. Results indicate that calcium pyruvate supplementation during training does not significantly affect body composition or exercise performance and may negatively affect some blood lipid levels. No significant calcium pyruvate side effects were reported.

Calcium Pyruvate side effects questions
Q. Can taking 2000 mg a day of the calcium pyruvate extra strength cause any mood swings that you know of?
   A. We have not had this reported to us yet.