US Peptide Labs

Ordered both KPV and semaglutide for different projects. The semaglutide was good quality with a solid COA showing 98.1% purity. KPV was more questionable - reconstituted with some slight cloudiness that eventually settled but made me nervous about contamination. Customer service took 3 days to respond to my concerns which isn't great. Shipping was okay, about 5 days total. Prices are reasonable. The issue is quality control seems inconsistent between products. I'll probably use them again for semaglutide but might source KPV elsewhere. Not bad overall but not amazing either.

Third order of BPC-157 from US Peptide Labs and they've delivered every time. Purity testing consistently shows 97-99% which is solid for the price point. Ships fast, arrives cold, vials are properly sealed. Customer portal makes reordering easy. My research group has had zero issues with their BPC batches. Price is fair compared to premium vendors. Would recommend for anyone doing injury recovery research protocols.

Been using US Peptide Labs for about 6 months now and they've become my go-to for semaglutide. The consistency batch to batch is what impresses me most - we've run mass spec on three different orders and the purity variance is less than 0.5% which is really tight. Their COAs are comprehensive with full amino acid sequencing data, not just basic HPLC. Shipping is fast, usually 3 days to the east coast. The lyophilization is done well so reconstitution is always smooth. Customer support is responsive via email, though they don't have live chat which would be nice. Pricing is mid-range but the quality justifies it. My only real complaint is their website search function is terrible - easier to just browse categories. Will definitely continue ordering from them for our obesity research protocols.