Garcinia cambogia: does it work, and is it safe?
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- Single-ingredient garcinia cambogia capsules. Best for: Adults whose doctor has reviewed the liver and drug risks. See options on Amazon
- Dried Malabar tamarind for cooking. Best for: Cooks who want the traditional sour flavor in curries. See options on Amazon
What garcinia cambogia is
Garcinia cambogia (Garcinia gummi-gutta), also called Malabar tamarind or brindle berry, is a tree native to India and Southeast Asia. The National Center for Complementary and Integrative Health (NCCIH) says the fruit has been used as a tea in folk medicine for inflammation and stomach complaints, and the rind as a food preservative.
NIH's LiverTox database adds that the dried, smoked rind is used as a sour flavoring, especially in fish curries. The rind contains hydroxycitric acid (HCA) along with other compounds such as xanthones and benzophenones. LiverTox says the fruit is 10% to 30% HCA by weight, and extracts can contain 20% to 60%.
Does it work for weight loss?
| Question | What NCCIH and LiverTox say |
|---|---|
| Weight loss in people | Unclear: modest effect in some studies, none in others |
| Appetite suppression | Seen in rats; not consistently found in people |
| Other uses | Less research |
HCA blocks an enzyme involved in making fat, called ATP citrate lyase. In rats, garcinia and HCA caused appetite suppression and weight loss. LiverTox says these effects have not been consistently found in human studies, and NCCIH says more research is needed to confirm any effect.
Garcinia is also a frequent ingredient in over-the-counter multi-ingredient weight loss products, which makes it hard to know what any one ingredient is doing.
Liver injury: the main safety concern
- Reported cases. LiverTox describes at least a dozen cases of liver injury in people taking multi-ingredient supplements containing garcinia, some of which also contained other known or suspected liver toxins, and more recent cases with products labeled as garcinia alone.
- How often. The frequency is unknown but likely uncommon, under 1 in 10,000 users.
- Timing. People typically developed fatigue, nausea and jaundice 1 to 4 weeks after starting, though some took 3 to 12 months.
- Severity. Some cases led to acute liver failure and death or urgent liver transplant. Most improved within 1 to 3 months of stopping.
- Rating. LiverTox gives garcinia a likelihood score of B, a likely rare cause of clinically apparent liver injury.
- Animal data. Animal studies did not show significant toxicity overall, though high doses caused testicular toxicity in rats.
- Labels. LiverTox notes there are at least 400 other Garcinia species, and mislabeling or adulteration is always a concern with herbal products.
If you take garcinia and notice yellow skin or eyes, unusual fatigue or nausea, stop and see a doctor right away. LiverTox advises against restarting it after a reaction.
Other side effects and interactions
- Common effects. NCCIH lists headache, nausea, diarrhea and other digestive symptoms.
- Serotonin drugs. NCCIH reports interactions with some drugs that affect serotonin, and LiverTox notes rare reports of serotonin syndrome.
- Muscle breakdown. LiverTox mentions rare reports of rhabdomyolysis.
- Liver-affecting drugs. Interactions with some drugs affecting the liver have been reported.
- Pregnancy and breastfeeding. Little is known about safety.
If you still want to try it
- Talk with your doctor first, especially if you have liver disease, take antidepressants or other serotonin drugs, or take medicines processed by the liver.
- Avoid multi-ingredient fat burners. LiverTox notes some blends contained other known or suspected liver toxins.
- Choose a single-ingredient product that names Garcinia cambogia or gummi-gutta and states the HCA content.
- Follow the label and do not combine several weight loss products.
- Watch for liver symptoms during the first months and stop at the first sign.
A safer way to use garcinia
The dried rind has a long culinary history as a sour flavoring and spice, especially in fish curries, and LiverTox says it has also been used in Ayurvedic medicine for digestive complaints and rheumatism. Using it as a spice is very different from taking concentrated extract capsules, which is where the liver reports come from.
What to look for when you buy
Single-ingredient garcinia cambogia capsules
Best for: Adults whose doctor has reviewed the liver and drug risks
A single-ingredient product that states HCA content avoids blends that LiverTox says sometimes contained other liver toxins.
Watch out: Rare but serious liver injury. Not with serotonin drugs. Stop for yellow skin, fatigue or nausea.
See options on AmazonDried Malabar tamarind for cooking
Best for: Cooks who want the traditional sour flavor in curries
LiverTox notes the dried, smoked rind is used as a flavoring and spice, especially in fish curries.
Watch out: Use as a cooking ingredient, not as a weight loss remedy.
See options on AmazonQuestions people ask
- Does garcinia cambogia work for weight loss?
- It is unclear. NCCIH says some studies show a modest effect and others show none.
- Is garcinia cambogia bad for your liver?
- Rarely, but seriously. LiverTox reports cases of liver injury, some fatal or needing a transplant, including with products labeled garcinia alone.
- What is HCA?
- Hydroxycitric acid, the main compound in garcinia rind, thought to suppress appetite. The effect seen in rats has not been consistent in people.
- Can I take garcinia with antidepressants?
- Ask your doctor first. Interactions with drugs affecting serotonin have been reported.
- What are the side effects of garcinia cambogia?
- Headache, nausea, diarrhea and other digestive symptoms, plus rare liver injury.
Sources
- Garcinia Cambogia: Usefulness and Safety (nccih.nih.gov), National Center for Complementary and Integrative Health
- Garcinia Cambogia - LiverTox (ncbi.nlm.nih.gov), National Institute of Diabetes and Digestive and Kidney Diseases