The Arylesterase Assay Kit is meant for measuring levels of Paraoxonase-1 (PON1) s, a high density lpoproten (HDL)-associated enzyme with antioxidant and antiatherogenic functions, protecting lpoprotens against oxidative modification. It has been shown that serum paraoxonase activity decreases diabetes mellitus, coronary artery disease, hypercholesterolemia, iron deficiency, anemia, hepatitis, cirrhosis, prostate cancer, tuberculosis and inflammations.