Myths vs facts: Magnesium and skin aging

The claim that magnesium can directly slow skin aging is weakly supported by science. Magnesium is an essential mineral involved in many metabolic processes, including DNA repair and collagen synthesis. A deficiency may indirectly impair skin health, e.g., through increased oxidative stress or inflammation. However, no robust clinical trials demonstrate that oral or topical magnesium supplementation acts as an anti-aging intervention. The cosmetics industry often markets magnesium as a 'miracle ingredient,' but evidence is mostly from in vitro or animal studies. For consumers: maintaining adequate magnesium levels is important, but overdosing (e.g., via supplements) can cause side effects like diarrhea or arrhythmias. MyBody-X tests measure magnesium in blood or stool, but interpretation for skin aging is speculative. Fact: sunscreen, a balanced diet, and not smoking have far stronger evidence against skin aging than magnesium.