Glycerol

Unlike the typical sports supplement designed to improve stamina and athletic performance, glycerol is unique: its primary role is to replace the fluid that is lost during exertion. During a strenuous workout you can lose as much as 3 to 4 pounds of fluid, and the loss can be even greater if you are exercising in a warm, humid climate. If the fluid is not replaced, you will not only slow down but run the risk of heat exhaustion and heat stroke. Dehydration results in a reduction in blood plasma, which leaves less blood to carry vital nutrients and oxygen to muscle cells. As a result, you will tire sooner and take longer to recover from your workout. In addition, there is less blood to cool down the skin. Drinking extra water helps to replace fluid, but it may not be enough.

Glycerol is a hydroscopic compound that naturally occurs in every cell of the body and helps cells hold onto water. Glycerol can travel in and out of cells, delivering water where it is needed. Studies have shown that when athletes drink a beverage containing glycerol during strenuous exercise, they lose less fluid and maintain lower body temperatures and a lower heart rate than when they drink water alone. Drinking a glycerol beverage after exercise can help rehydrate the body more quickly.