Supplement
Garcinia Cambogia
An extract from a tropical fruit, containing hydroxycitric acid (HCA), promoted heavily as a fat burner. It is one of the most widely sold weight loss supplements. The evidence tells a different story. When only the well-conducted trials are counted, the weight loss effect essentially disappears. A 2025 review of 14 studies found that none of them showed clinically significant weight loss.
Estimated cost
~$10–$25/month
How to take
Capsules before meals — straightforward
A 2020 review pooled 8 randomised controlled trials and found borderline statistically significant weight loss of 1.34 kg vs.
For context — weight loss from prescription medications:
How it works
HCA (hydroxycitric acid) is thought to block an enzyme called ATP-citrate lyase. That enzyme helps turn spare carbohydrate into stored fat. HCA may also raise serotonin levels, which could modestly cut appetite. Both routes are plausible in theory. The problem is that they have not produced meaningful effects in rigorous human trials.
What the evidence shows
placebo (p=0.03). 'Borderline statistically significant' means the result only just clears the bar for being unlikely to be chance. When only the most rigorous trials are counted, the effect is no longer statistically significant. A 2025 scoping review of 14 studies found that all 14 failed to show a clinically significant drop in weight or BMI. The marketing claims for garcinia cambogia are much stronger than the evidence supports.
The trade-off
What this tends to offer:
- Affordable and widely available
What this involves:
- No significant weight loss in well-conducted trials
- Reports of liver damage in some products
- Heavily marketed based on low-quality early evidence
- Mechanism not shown in human studies
Safety
The most common side effects are headache and gut (GI) symptoms: nausea, diarrhoea, and stomach discomfort. There have been reports of liver damage at high doses. Those cases are rare, but the FDA and NIH have noted them. Given how weak the evidence for benefit is, the balance of risk against benefit is unfavourable. Not recommended as a weight loss treatment.
Community insights
These are personal experiences shared in public online communities — not medical advice.
“This supplement was made famous by TV promotion, not by clinical evidence. The science has consistently failed to back up the marketing claims.”
“If you want to try something in this price range, berberine or chitosan have much stronger evidence. Garcinia cambogia is not worth the money.”
Common questions
Written and maintained by one person · Built with agentic AI tools · Every number checked against the cited trial · Not medical advice
In the Meta-analysis of 8 RCTs (Golzarand 2020), Borderline significant weight loss of 1.34 kg vs. placebo (95% CI: -2.62 to -0.07, p=0.03). Effect disappears in higher-quality trials only.
In the Systematic review of rigorous RCTs only (Onakpoya 2011), When only well-conducted trials are included, the effect of garcinia cambogia is no longer statistically significant.
After reading this page, most people compare this with other supplements, look at prescription options, or check what they can do today without a prescription.
Next step most people take
Built with agentic AI tools and not a substitute for medical advice
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