Magnesium basics
www.ncbi.nlm.nih.gov › pmc › articlesIn vertebrates, magnesium is the fourth most abundant cation [5, 6] and is essential, especially within cells, being the second most common intracellular cation after potassium, with both these elements being vital for numerous physiological functions [6–9].
Magnesium in biology - Wikipedia
en.wikipedia.org › wiki › Magnesium_in_biologyMagnesium occurs typically as the Mg 2+ ion. It is an essential mineral nutrient (i.e., element) for life and is present in every cell type in every organism. For example, ATP (adenosine triphosphate), the main source of energy in cells, must bind to a magnesium ion in order to be biologically active. What is called ATP is often actually Mg-ATP.