The research peptide market is almost entirely self-regulated. Anyone can print a label that says 99 percent purity. This guide exists to score suppliers on what they can actually prove, so a buyer can tell a trustworthy supplier from a risky one in a couple of minutes.
Every supplier is scored on the same seven weighted criteria: independent lab testing, guidance and consultations, verified reviews, delivery, after-care, range and pricing. The heaviest weight sits on independent lab testing, because it is the one thing most sellers will not publish. We show a green tick only where we could open and check the evidence ourselves, and a grey dot where the supplier claims something we cannot independently verify. The full breakdown is on the how we rank page.
Peptide+ is one of the suppliers ranked on this guide, and this site was built by people connected to Peptide+. We would rather you heard that from us than found it out later. What that connection does not do is bend the scoring. Peptide+ is measured on exactly the same public method as every other supplier, and where it cannot prove something independently it gets a grey dot like anyone else. You do not have to take our word for any of it, the evidence behind each score is linked so you can check it yourself.
A supplier can become a verified partner, which adds a link to their own website. That is the commercial side, and it is kept completely separate from the ranking. Partnership adds a link; it never changes a score or a position. No supplier can pay to move up the list, and a supplier that pays nothing is still scored, reviewed and listed on the same terms as everyone else.
We do not invent reviews, we do not publish a score we cannot back up, and we do not make medical or treatment claims. Everything here is research-use information, not medical advice. If you spot something out of date or wrong, tell us at hello@peptidesupplierguide.com and we will check it.