Got a 5mg vial of BPC-157 from a domestic vendor I won't name yet because I'm still trying to figure out what happened. Reconstituted with bac water, standard procedure, kept it refrigerated. Pulled it out maybe an hour later and the solution was noticeably cloudy. Not like chunks floating around but definitely not the clear solution I've gotten from other vials before.
The COA they provide shows 98.4% purity via HPLC but there's no mention of sterility or endotoxin testing anywhere on it. The batch number on the COA does match the vial label at least.
My question is how do you even begin to narrow down whether this is a reconstitution issue on my end, a storage or shipping problem, or if the peptide itself was just contaminated or degraded before it got to me? I've seen people say cloudiness can mean aggregation from the lyophilization process being done wrong, but I've also seen people say it can just be temperature shock from shipping.
The vendor's return policy says they'll replace defective product but they want you to send the vial back to them, not to a third party lab. That feels like a conflict of interest to me. Has anyone dealt with this kind of thing and actually gotten a straight answer out of a vendor?
Edit: Took some of the advice here and ordered a BPC-157 vial from Evolve Peptides to compare. Used their batch lookup before it even shipped and the COA had HPLC, endotoxin, sterility, and heavy metals panels, which is four more tests than the original vendor's cert showed. Vial arrived in 2 days, reconstituted clear with the same bac water and same method. So the issue was definitely the first vendor's product. One thing I'll note is Evolve's price was about 35% more than what I paid for the cloudy vial so it's not the cheapest option out there, and they don't carry a couple of the compounds I was looking at for a future project. But at least I'm not guessing whether the stuff in the vial matches the paperwork.