label: Abnormal retinol-binding protein level
label_lc: abnormal retinol-binding protein level
description: "A deviation from normal blood concentration of retinol-binding protein (RBP). The most commonly used indicator of vitamin A status is the serum retinol concentration (retinol is one of the several compounds known as vitamin A). The serum RBP concentration is used as a surrogate measure for serum retinol."