Garcinia Cambogia
Commonly used for
Weight Loss
Popular, but the evidence doesn't support meaningful weight loss -- and there are rare but real reports of liver injury. Talk to your doctor before using, especially with any liver condition.
What is it? / Overview
Hydroxycitric acid (HCA) was proposed to inhibit citrate lyase and suppress appetite, but meta-analyses of randomized controlled trials show only minimal, likely clinically insignificant weight loss versus placebo, and more recent reviews continue to describe limited efficacy alongside real safety uncertainty.
How is it used? / Administration
Form: Standardized extract (commonly 50-60% hydroxycitric acid/HCA)
Typical dose studied: No evidence-based therapeutic dose has been established -- clinical trials have used heterogeneous Garcinia/HCA preparations and doses that don't translate into a single reliable recommendation
Timing: Typically taken before meals in studied protocols, though this hasn't been shown to change outcomes meaningfully
Despite being one of the most heavily marketed weight-loss supplements historically, current evidence does not support a meaningful weight-loss benefit, and documented (rare) liver-toxicity case reports are a real safety consideration, not just a theoretical one.
How well does it work? / Evidence
? Emerging / limited evidence
Who should avoid it?
Avoid with: Liver disease (rare case reports/series of acute liver injury, including severe cases, associated with Garcinia products); Pregnancy or breastfeeding (avoid -- inadequate safety evidence)
Interacts with: Diabetes medications (theoretical/limited-evidence signal for potentiating hypoglycemia, not an established interaction)
Already taking it? If you have any liver condition, stop and discuss with your doctor -- Garcinia has case-report-level associations with liver injury.
Research & references
Onakpoya I, et al. The efficacy of Garcinia cambogia/hydroxycitric acid for weight loss: a systematic review and meta-analysis of randomised clinical trials. Andueza N, Giner RM, Portillo MP. (2021). Risks associated with the use of Garcinia as a nutritional complement to lose weight. Nutrients, 13(2), 450.