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Pyruvate might contribute to weight loss by increasing the breakdown of fat. In addition, pyruvic acid seems to cause the outer layer of skin cells to slough off, which accounts for its use in reversing aging due to exposure to the sun. Pyruvate converts to Acetyl CoA which can feed into the Krebs cycle to generate ATP (main energy source), but Acetyl CoA is also a central link or connecting point between cycles for a number of pathways used for metabolism of fats, proteins, ketones and steroids/cholesterol, as well.*.