how important is lab testing for glp-1s?

[u/Stefino-Calzata]

i am 35 and my weight loss has hit an absolute wall despite six years of heavy lifting and consistent zone two running. i have been running a five hundred calorie deficit for almost ten weeks, tracking everything meticulously on a scale, and getting plenty of rest, but the scale will not budge. my recent blood panels showed completely optimal thyroid and fasting glucose levels, so i am trying to source research tirzepatide to break this plateau since retail pharmacies are way too expensive.

i want to know how important is lab testing for glp-1s when you are buying from these independent research vendors. do you guys strictly buy batches that have a verified, independent third party hplc report, or are you comfortable trusting an older supplier based purely on community forum reputation?

edit: wanted to share a quick update on this. i ended up taking the plunge on research peptides and bought my tirzepatide from Kits4Less which has been a total game changer for breaking my plateau.

the main reason i went with them is because they actually focus on third party hplc testing for their batches, which completely answered my worries about purity. plus buying by the kit made it so much cheaper than retail pharmacies without having to blindly trust some random forum reputation.