Is Magnesium useful for Sport?

Magnesium is relevant for athletes because it supports muscle contraction, energy metabolism, and electrolyte balance. A deficiency may increase the risk of cramps and impair performance. However, evidence for routine supplementation in sports is mixed: it helps when a true deficit exists, but offers little benefit for well-nourished individuals. Blood tests can assess magnesium status, but DNA tests claiming to predict magnesium needs are based on weak associations and are not clinically validated. The provided context does not include specific studies on magnesium and sports. Therefore, the evidence level is unclear. Be cautious of marketing claims that promote genetic testing as a personalized magnesium optimization tool.