Do research peptide vendors get their products tested for endotoxins?

Some do and publish it, most listings do not mention it at all. Endotoxin testing checks for bacterial contamination that purity testing alone will not catch, which matters more for an injectable product than a capsule. This site's laboratory profiles record which of the testing laboratories in this market offer endotoxin testing as a named, orderable test, because a certificate that only reports purity has not addressed contamination.

Educational use only. This database summarizes published research and is not medical advice. Where a dose appears it is a record of what a trial or clinic ran, or what people describe doing, with its source attached. Nothing here is a recommendation for personal use.

Part of buying, vendors, and lab testing. How to evaluate a seller's claims, certificates of analysis, and pricing.