A dietary supplement claimed to accelerate fat loss. Many of the commercial products promoted as fat burners contain ephedrine alkaloids derived from the herb Ephedra. These alkaloids belong to the stimulants, a group of drugs on the World Anti-Doping Agency's 2005 Prohibited List. Therefore, athletes should be particularly cautious about using dietary supplements and products that have vague content labels or make claims about fat burning. Some studies indicate ephedra-containing supplements accelerate weight loss, but there are many concerns about the damaging effects the products have on the cardio-vascular, nervous, and thermoregulatory systems.
Subjects: Sports and Exercise Medicine.