What should I know about Magnesium Test?

A magnesium test (e.g., from blood or saliva) typically measures serum magnesium, which represents less than 1% of total body magnesium. A normal serum level does not rule out intracellular deficiency. MyBody-X does not offer a dedicated magnesium test; the few related DNA markers (e.g., TRPM6) have weak, mechanistic evidence for magnesium homeostasis. For reliable assessment, clinical lab tests (whole blood, RBC magnesium) and medical interpretation are required. Evidence: unclear – no validated consumer tests for magnesium status.