Hydroxycitric acid (HCA) is a derivative of citric acid and is primarily found in the rind of Garcinia cambogia and other Garcinia species. It is known for its role in weight management supplements due to its potential to inhibit the enzyme ATP citrate lyase, which is involved in the conversion of carbohydrates into fat. HCA is highly soluble in water, making it easily absorbed in aqueous environments, but it is less soluble in alcohol and insoluble in fats. It is not volatile, which means it does not readily evaporate at room temperature. The compound is often studied for its potential effects on appetite suppression and fat metabolism, although scientific consensus on its efficacy is still under investigation.