Laboratory tests, including blood tests (to check electrolyte levels) and urine tests (e.g. urine specific gravity and creatinine), may be used to evaluate the severity of the problem.
A urinary level greater than 0.05 mg iodine per gram of creatinine (another metabolite excreted in urine) indicates adequate iodine status.
Cadmium toxicity is generally indicated when urine levels exceed 10 mg/dL of creatinine and blood levels exceed 5 mg/dL.
Levels under 0.025 mg iodine/gram creatinine indicate serious risk.