A number of popular supplements to enhance weight loss by increasing resting energy burning levels (e.g. Ma Huang, Mormon Tea) contain ephedrine that increases heart rate and blood pressure thus placing masters athletes with cardiac risk factors at greater risk. Combining these products with caffeine (coffee, guarana) will further increase the risk. The IOC has banned the use of ephedrine.
Androstenedione is a “prohormone” steroid that can be converted to testosterone in the body and thus potentially increase muscle mass, aid recovery, and build strength. However, research has shown it fails to meet any of these claims. However, it also has negative side effects such as lowering the concentration of good (HDL) cholesterol in the body – a worry for an aging athlete focused on good health. The IOC has also banned it.