Garcinia cambogia (HCA) was one of the most hyped weight loss supplements of the 2010s. Our research shows the reality is disappointing: a large meta-analysis found statistically significant but clinically irrelevant weight loss (~0.88 kg more than placebo over 12 weeks). Multiple case reports of hepatotoxicity have been documented. This is a supplement where the marketing dramatically outpaced the evidence.
Garcinia inhibits same fat synthesis pathways; additive effects on liver metabolism
HCA may lower blood sugar; additive hypoglycemia
HCA increases serotonin availability; theoretical serotonin syndrome risk
Multiple case reports and FDA warnings document liver injury associated with garcinia-containing products (PMID: 26386310). Mechanism unclear — may be HCA itself or contaminants in multi-ingredient products. The FDA issued a safety warning in 2009 after Hydroxycut (containing garcinia) was linked to liver failure cases.
Not Prohibited
Onakpoya I et al. The use of Garcinia extract as a weight loss supplement: a systematic review and meta-analysis.
Lunsford KE et al. Dangers of dietary supplements: Garcinia cambogia-associated hepatic failure.
Reviewed by the Scan Dose Research Team and Clinical Advisory Board | Last updated: April 2026
Not medical advice. Based on published clinical research and systematic reviews.