7–30 ng/dL; SI units: 190–832 pmol/L (drawn in upright position)
3–16 ng/dL; SI units: 80–440 pmol/L (drawn in supine position)
. Red-or green-top tube.
■ Aldosterone is a potent mineralocorticoid that regulates sodium,
potassium, and water balance.
■ Used with plasma rennin levels to distinguish between primary or
secondary (more common) hyperaldosteronism.
