Thank you for your response. It gave me pause and I spent some time really looking at my results. Your lab is measured in Liters, mine in milliliters. I tried converting my results to Liters and it's nutty .. a negative number. I had asked for a P1NP which, apparently, he had never ordered because he couldn’t find the code in Quest and ordered it in LabCorp. But I see now- that the lab he ordered was a propeptide type 1 collagen, not a procollagen type 1 intact N terminal peptide. Looking up the differences it says : Procollagen type I intact N-terminal propeptide (PINP) and propeptide type I collagen both relate to bone formation but differ in their detection and clinical uses. P1NP refers to the intact N-terminal propeptide of type I procollagen, while propeptide type I collagen can refer to either the N-terminal or C-terminal propeptides released during procollagen processing. P1NP is a sensitive marker for bone formation and is often used to monitor osteoporosis and bone health.
Feb 2025 the labs from LabCorp result of 715 was propeptide type 1 collagen. (7months of Tymols)
May 2025 labs were from Quest and the result of was P1NP 250mcg/ml and CTX. 1213pg/ml
Confusing, but it makes me feel better knowing that the high number of 715 really was not a P1NP but a differnt marker .