Peptide Pros

Peptide Pros has become my preferred source for tirzepatide after testing samples from five different vendors. Their product consistently comes back at 98.5-99.1% purity which is exceptional. The lyophilization quality is professional grade - reconstitutes perfectly clear every single time with zero particulates. COAs include full mass spec analysis not just basic HPLC which gives me confidence in what we're actually getting. Shipping averages 3-4 days with excellent cold chain management. The vials are pharmaceutical grade with clean crimps. Customer service is knowledgeable and responds within 24 hours. Pricing is higher than budget vendors but significantly cheaper than the premium boutique suppliers. My lab has gone through 15+ vials over the past 4 months with zero quality issues. The website could use better mobile optimization but that's a minor complaint. Highly recommend for serious metabolic research where peptide integrity actually matters.

They sent me an email asking for a review so here it is. Got tirzepatide and CJC-1295 about two weeks ago. Both peptides arrived fast - ordered Wednesday, had them Monday. Packaging was excellent with gel packs still frozen solid. COAs were included and showed 98.6% for tirz and 97.2% for CJC. Good stuff.

Was asked to write this after my recent purchase. Ordered tirzepatide and TB-500 for two separate research protocols. Both arrived within a week properly packaged with temperature monitoring strips showing they stayed cold the whole time. The tirzepatide COA showed 98.9% purity with comprehensive testing data. TB-500 came in at 97.4% which is acceptable for our purposes. Reconstitution was smooth for both peptides. Customer portal is easy to use and reordering is quick. Pricing seems fair compared to what I've paid elsewhere. Only complaint is their minimum order threshold is a bit high if you just want to test a single vial. Overall good experience and I'll order again when we need to restock.