Deoxypyridinoline is nothing but one of two pyridinium cross-links that get to provide structural stiffness to type I collagen found in bones. The deoxypyridinoline (DPD) urine test is indeed used to measure the bone re-absorption rates and this in turn can be highly helpful in determining whether there’s any risk of enhanced bone diseases or not. This test can be helpful in determining the present of osteoporosis and several other bone diseases on the whole.