(-)-Hydroxycitric acid lactone is primarily studied for its role in weight management and metabolic regulation. It is often used in dietary supplements aimed at reducing body fat and appetite, as it is believed to inhibit an enzyme involved in fat production. Additionally, it has been explored for its potential to improve exercise endurance and energy levels by influencing carbohydrate metabolism. Research also suggests its use in managing cholesterol levels and supporting cardiovascular health. However, further studies are needed to fully establish its efficacy and safety in these applications.