This curbs the appetite and slightly increases the number of calories burned by the body. On the other hand, in some people, ephedra compounds can have serious side effects, such as insomnia, heart rhythm problems, high blood pressure, nervousness and shaking, seizures, heart attacks, stroke, and death. A compound called hydroxycitric acid is obtained from the herbs Garcinia cambogia and Garcinia indica. It's believed to promote weight loss by blocking the body's ability to process fats. A recent study found the herb had no side effects, but wasn't any better than a placebo during a 12-week trial.
Many people believe that herbal supplements are safe because they are derived from natural products.
But you still need to use caution. Supplements aren't regulated by the FDA and no official standards have been developed. The strength and quality of an herb can vary greatly, depending upon the growing conditions, soil, and manufacturing process. Herbal supplements may contain other ingredients that can cause serious side effects. Doctors also warn that some herbs can interact with prescription medications, rendering them ineffective, increasing their potency, or creating a toxic combination.