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DiscussionHow are results from P1 NP and CTX affected by nonfasting blood draw?
Osteoporosis & Bone Health | Last Active: Feb 28 9:25am | Replies (9)Comment receiving replies
Replies to "You are to fast for these 2 tests and preferably in the early morning and each..."
P1NP does not have to be fasting but since you usually do them together, it will be! From online:
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC8252919/
PINP decreases 3.8% (+/− 0.9%) following intake of food. 15 The coefficient of cyclic variation of PINP is in the range of 3–5% which is very low. 16 Hence blood sampling can be performed at any time of the day regardless of fasting status, which is a major advantage of using sPINP as a bone marker. 17 Either serum or EDTA plasma sample may be used for PINP measurement and the results treated interchangeably as they are equivalent.