Mineral testing is not one universal “panel,” but a set of labs chosen based on symptoms. Common tests include electrolytes (sodium, potassium, chloride), calcium, magnesium, phosphate; iron studies (ferritin, serum iron, TIBC/transferrin saturation) plus a CBC. Trace elements like zinc or selenium are ordered selectively. Timing matters: acute infection/inflammation, recent high-dose supplements, or dehydration can skew results. Clinicians also review medications and supplements (iron/zinc/magnesium), diet patterns, and symptom duration. In some cases, urine studies (renal losses) or stool occult blood tests are needed. After results, the plan should address: Is there deficiency? Why? How to replete? When to recheck?\n\nSource note: NIH ODS mineral fact sheets (assessment and interaction considerations).