An abundant intracellular amino acid in skeletal muscle and similar to Creatine, it draws water in muscle cells and acts as a cell volumizer. This in turn draws additional nutrients for recovery and growth, increasing cell volume and enhancing muscle fullness. And like Creatine, Taurine is not present in whey protein, whereas all other essential and nonessential amino acids are.
With intense exercise comes changes in electrolyte concentration both inside and outside of the cell, i.e. loss of muscle K+ and gain of Na+, Cl- and Ca2+. Detrimental changes in osmolarity are a consequence of membrane excitability driven by ion imbalance and cells combat this by manipulating organic osmolytes such as Taurine.
Taurine regulates water and mineral salts in the blood. It maintains movement of potassium, magnesium and sodium across the cell membranes and regulates ion balance between cells. Due to its ability to regulate electrolytes, it may play a role in preventing muscle cramping.