Dr Justin Saya MD
Moderator
This is very helpful. Thank you! The other strange thing is that I almost NEVER see a patient's baseline IGF1 outside of the normal range. It always seems to be smack dab in the middle of the normal range! Is that consistent with what you see? I almost hate to do follow up IGF1 tests (but we do,) if patients are responding well, qualitatively. I say this bc they are doing very well, loving the sermorelin, then when they see that their IGF1 levels barely moved, they then start saying it doesn't feel like it's working, when; infact, they had been raving about how great they felt prior to their IGF1 follow up test.
Well this raises another possibility that I didn't mention above for not seeing changes in IGF-1...suspect lab results. I tend to see baseline IGF-1 levels ALL OVER the place from below range, mid range, to even some above range (naturally high, taking "research peptides (similar to sermorelin), or rhGH for example). I use LabCorp (more often) and Quest (less often) and find LabCorp results reliable in my experience.
I've had a few cases similar to what you describe. Again, in those cases a 3 specimen GH stim test will "prove" whether the sermorelin is working or not. APS products are generally reliable, but once it's in the patient's possession (and reconsitituted)...who knows. They should be counseled to keep refrigerated and not to shake/agitate the vial too much.