Blackmores Professional MP65: Magnesium and phosphate are vital for energy production, and, in the form of Mg-ATP, help fuel nearly all the body's cellular processes, including muscle function and nerve conduction. The production and storage of energy in the body depends on the availability of both magnesium and phosphate Phosphate is incorporated into compounds such as ATP and cyclic AMP. Magnesium combines with and stabilises the ATP molecule, and the resultant Mg-ATP complex (rather than ATP alone), is the substrate for most ATP-requiring enzymes.