Feb 14, 2026Magnesium: Deficiency in Aging, Form Comparison, and Evidence for Sleep, Blood Pressure, and MuscleMagnesium is the fourth most abundant mineral in the body and cofactor for over 300 enzymes. Dietary insufficiency is widespread — over 50% of adults consume below the RDA. Supplementation improves sleep quality, blood pressure, and muscle function, with form choice determining tolerability and absorption.