They tend to work via one or more of these mechanisms:
- Reduce appetite, making you feel more full so that you eat fewer calories
- Reduce absorption of nutrients like fat, making you take in fewer calories
- Increase fat burning, making you burn more calories
How it works: Animal studies show that it can inhibit a fat-producing enzyme in the body and increase levels of serotonin, potentially helping to reduce cravings (1, 2 Trusted Source).
Effectiveness: One study with 130 people compared garcinia against a dummy pill. There was no difference in weight or body fat percentage between groups (3).
Side effects: There are no reports of serious side effects, but some reports of mild digestive problems.