Let’s explore “Specific gravity — lab reference”

≥75 increased; ≥125 commonly treated as a risk-enhancing level. Units are not directly interchangeable with mg/dL.

≥2 suggests higher cardiovascular risk; >10 may reflect acute inflammation and should generally be repeated when well.

Age, kidney function, obesity, rhythm, and clinical setting affect interpretation.

Adult interval. Pregnancy and pituitary disease require different interpretation.

Binding abnormalities and severe illness may affect some free-hormone assays.

Useful in selected hyperthyroid states; not a sensitive stand-alone test for hypothyroidism.

Affected by thyroid-binding globulin, pregnancy, estrogen, and medications.

Affected by binding proteins and nonthyroidal illness.

The test method matters. Positive result supports thyroid autoimmunity but does not determine treatment alone.

The test method matters. Also affects thyroglobulin tumor-marker interpretation.

Morning fasting collection is preferred when practical. Day-to-day variation is substantial.

Ask your clinician to read this result with iron, transferrin saturation, and ferritin.