Supplement analysis backed by scientific evidence · PT

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Limited evidenceWeight management

Calcium Pyruvate

A 1990s fat-loss ingredient still sold today. The meta-analysis found a statistically significant but very small weight difference from trials of poor methodological quality, and the authors did not consider the evidence convincing.

Evidence last reviewed: August 2026

What the science says

  • Body weight Limited evidence

    A systematic review and meta-analysis of randomized clinical trials found a small significant reduction in body weight with pyruvate, but noted that the trials had methodological weaknesses and concluded the evidence is not convincing.

  • Body composition with training Limited evidence

    A randomized controlled trial of calcium pyruvate during training found no benefit for body composition, exercise capacity or metabolic responses. An earlier small trial in overweight individuals reported modest fat loss; the results conflict.

  • Doses used in supplements Limited evidence

    Positive early studies used pyruvate at 20–30 g/day, far above the 500–1,000 mg typically found in commercial capsules. Nothing supports the marketed dose.

Dosage & safety

Studied doseTrials used 5–30 g/day of pyruvate; commercial calcium pyruvate capsules usually supply 500–1,000 mg per serving, well below anything studied.
SafetyGastrointestinal side effects are common at the doses actually studied: gas, bloating and diarrhoea. Large amounts of calcium pyruvate also add meaningful calcium intake. No long-term safety data.

Scientific references

Where to buy

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