Garcinia Cambogia: Does It Work? Evidence, Side Effects and Liver Risks

Garcinia cambogia is a tropical fruit whose rind contains hydroxycitric acid (HCA), the ingredient behind a long line of weight-loss supplements. The research is unimpressive: the largest rigorous US trial found no extra weight or fat loss compared with placebo, and pooled trials show at most a small, short-term difference of under one kilogram. Garcinia cambogia side effects are usually mild, such as headache, nausea and stomach upset, but a National Institutes of Health liver-injury network has documented serious liver damage linked to garcinia products, and France suspended their sale in 2025. Here is what the evidence shows, which medicines may interact, and how to read labels that list it.

Peptide Labs sells supplements that contain garcinia, but this article does not recommend any of them. It is general information, not medical advice.

What is garcinia cambogia?

Garcinia cambogia is a tree native to India and Southeast Asia, according to the National Center for Complementary and Integrative Health (NCCIH). The rind of its fruit contains hydroxycitric acid, which has been studied for its effect on appetite. Supplements usually list “garcinia cambogia extract” or “garcinia fruit extract”, sometimes with a percentage of HCA, and most combine it with other ingredients.

How hydroxycitric acid is supposed to work

In lab studies, HCA blocks an enzyme called ATP citrate lyase, which helps the body build fat from carbohydrates. The NIH Office of Dietary Supplements (ODS) lists the proposed effects as reduced fat production, more glycogen storage in the liver and lower food intake. Animal studies showed less eating and weight gain, but the ODS says human evidence is conflicting and any effects appear small.

Does garcinia cambogia work? What the trials show

The strongest early test came from Columbia University in 1998. In a double-blind trial, 135 adults took HCA or a placebo for 12 weeks while following a high-fiber, low-calorie diet. Both groups lost weight, but the placebo group actually lost slightly more on average, and the difference was not significant. Fat loss did not differ either. The authors concluded that garcinia failed to produce weight or fat loss beyond placebo.

A 2011 meta-analysis found 23 eligible trials, included 12 and pooled 9. HCA groups lost 0.88 kg more than placebo groups, a small effect with uncertain clinical relevance, and digestive side effects were twice as common with HCA in one study. The ODS notes that when only the two rigorously designed trials were considered, the difference was no longer statistically significant. Its consumer summary is blunt: garcinia has little to no effect on weight loss. The NCCIH puts it more cautiously, saying some evidence suggests a modest effect while other evidence shows none.

What about hunger? In the trial of 89 women, garcinia did not change appetite or feelings of fullness, even though that group lost a little more weight. Our guide to appetite suppressants compares ingredients with stronger evidence, and our review of whether fat burners work covers the multi-ingredient formulas garcinia often appears in.

Garcinia cambogia side effects

In trials, reported side effects were generally mild: headache, nausea, diarrhea, other digestive symptoms and upper respiratory symptoms. Two rarer problems deserve attention. First, the ODS notes three published cases of mania, with grandiosity, irritability, pressured speech and little need for sleep, possibly related to HCA’s effects on serotonin. Second, there are reports of liver injury, described below. Because every clinical trial of garcinia has been short, its long-term safety is unknown.

Liver injury reports

The NIH-funded Drug-Induced Liver Injury Network (DILIN) reviewed 1,418 patients enrolled from 2004 to 2018 and identified 22 cases it attributed with high confidence to garcinia products: 5 with garcinia alone, 16 with garcinia plus green tea and 1 with ashwagandha. Patients were 17 to 54 years old, and injury appeared a median of 51 days after starting. Ninety-one percent were hospitalized, one person needed a liver transplant and one died. A gene variant called HLA-B*35:01 was far more common in these patients, which the researchers say suggests an immune-mediated reaction.

The NCCIH says severe cases appear to be uncommon, and in many reports the products contained other ingredients, so garcinia cannot always be singled out. Green tea extract has its own record, explained in our green tea extract guide, and our article on liver cleanse supplements explains how herbal products became a recognized cause of liver injury. Stop the product and see a doctor promptly for yellow skin or eyes, brown urine, light-colored stools, unusual tiredness, itching, nausea or pain in the upper abdomen.

The 2009 Hydroxycut recall, stated precisely

On May 1, 2009, the FDA told consumers to stop using Hydroxycut products made by Iovate Health Sciences after 23 reports of serious problems, from jaundice to liver damage requiring a transplant, and one death from liver failure. Iovate recalled the products. Hydroxycut formulas at the time contained garcinia cambogia among many ingredients, but the FDA said it had not determined which ingredients were associated with the risk. According to the FDA, the reformulated product that returned later in 2009 kept only caffeine from the old formula, so today’s Hydroxycut is a different product.

France suspended garcinia supplements

After its food safety agency, ANSES, warned of serious and sometimes fatal liver, psychiatric, digestive, heart and muscle effects, France suspended the import and sale of food supplements containing garcinia cambogia for one year from April 18, 2025. In April 2026 the suspension was renewed for another year while the European Food Safety Authority completes its own assessment. Garcinia remains legal to sell as a dietary supplement in the United States.

Drug interactions and who should avoid garcinia

Talk to a clinician or pharmacist before trying garcinia if any of these apply:

• Antidepressants and other serotonin drugs: the ODS describes serotonin toxicity in a person taking garcinia with two SSRI antidepressants, and the NCCIH notes reported interactions with some drugs that affect serotonin.
• Medicines that affect the liver: the NCCIH also notes interactions with some of these drugs.
• Liver disease or a past drug-related liver injury: given the DILIN cases, this is a conversation to have with your doctor first.
• A history of mania or bipolar disorder: the published mania cases are rare but relevant.
• Pregnancy or breastfeeding: the NCCIH says little is known about safety.

Reading labels that list garcinia

Garcinia almost always appears in blends, which makes it impossible to credit any effect to garcinia alone and harder to know what you are combining. Three products we carry show the range:

DR VITAMIN SOLUTIONS Thermogenic Fat Burner, whose current label is named Brazilian Lean, pairs garcinia with green tea extract and caffeine, the same garcinia and green tea combination seen in most DILIN cases, and its allergen line lists shellfish from the kelp. GLPLUS+ is a stimulant-free blend, according to the brand, that also contains turmeric extract; see our turmeric safety guide. It is a dietary supplement, not a GLP-1 medication. FOODOLOGY Coleology Cutting Jelly is a fiber jelly that lists garcinia extract and contains milk, fish and wheat.

Be wary of dramatic marketing. In 2017 the Federal Trade Commission settled charges against Tarr, Inc., whose fake news sites and invented celebrity endorsements promoted a “Miracle Garcinia Cambogia” product with before-and-after weight claims. In 2019 the FTC brought its first case over fake paid reviews on an independent retail site, against the seller of a garcinia supplement. A seal from a certifier confirms that a label matches the contents, not that a product works or is safe for you; our guide to third-party tested supplements explains the difference.

Frequently Asked Questions

Questions about a label? Contact us or read our Buyer’s Guide. Follow the label and ask a healthcare provider before starting any supplement, especially if you take medicines. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.

Last reviewed September 2026.

Related guides: Do Fat Burners Work? Thermogenic Ingredients, Evidence and Risks, Appetite Suppressants: Prescription Drugs, Natural Options and the Risks, Liver Cleanse Supplements: What Is Inside, What Research Measured and Safety Risks.