To give you an idea of what this product is, it was designed for cyclist's. It pulls water from anywhere it can get it (including the skin) and uses it for purposes such as muscle and organ function. Many bodybuilders use it before a show, and or photo shoot. (It was one of the recommended products Bill Philips had for his before and after comp) It also aids in vasodilation, although I am not really sure of the mechanism it utilizes to do this. Twinlab makes a good version it is called "Glycerol Fuel." I have used it myself and have seen quite a difference, it seems to work one to two hours after I take it. However, everyone is different so play w/ the dosage and the amount of time you use it.