UreaAide™ works by osmosis. It really is that simple. When you have excess water (SIADH/Hyponatremia) it is that excess water that is diluting your sodium and causing the number to be low. UreaAide™ works by increasing the osmolarity (concentration) in the urine which will ultimately draw water to flow in the urine out of the body. As this water leaves the body the dilution effect decreases and the sodium rises. It really is that easy.