What does a low Magnesium result mean?

A low magnesium level (hypomagnesemia) is a clinical laboratory finding that can result from inadequate intake, increased losses (e.g., diarrhea, vomiting, diuretics), or renal dysfunction. Magnesium is critical for muscle and nerve function, heart rhythm, and bone health. Deficiency may cause symptoms like muscle cramps, fatigue, arrhythmias, or neurological issues. Interpretation requires clinical context—an isolated low value without symptoms may not require immediate treatment. Evidence is based on clinical practice and studies (human-strong). Caveat: reference ranges vary; a physician should evaluate the result and consider additional tests (e.g., ionized magnesium, renal function).