Magnesium Supplementation 101: Choosing the Best Form for Your Patient’s Needs

Compare types of magnesium supplements, including glycinate, malate, L-threonate, and citrate, to choose the best form for sleep, energy, and digestion. CASI Editorial Team Jun 02, 2026 Magnesium is among the most frequently recommended supplements in clinical practice, and for good reason. It is involved in more than 600 enzymatic reactions throughout the body, and is involved in energy production, neuromuscular function, glycemic regulation, cardiovascular physiology, and bone metabolism. Despite its importance, nearly half of U.S. adults fail to meet their estimated average requirement from diet alone, and standard serum testing often fails to capture true insufficiency. Clinically, magnesium is often recommended because it supports a wide range of physiological systems, making it a common topic of conversation around sleep, energy, muscle tension, and digestion. What is discussed less frequently, however, is that not all magnesium supplements are created equal. Different forms vary significantly in absorption, tolerability, and clinical applications, and selecting the wrong form may limit effectiveness or increase the likelihood of unwanted side effects. What Is Magnesium and W...