We evaluate research peptide vendors across the market on five criteria — purity and third-party COA verification, pricing, shipping, customer service, and product selection — and only list the ones that clear every bar. After scouring the industry, one vendor currently meets that standard end to end: Oath Research. As additional vendors qualify, we'll add them and update this page.
Every vendor in our database is evaluated across five equally weighted criteria. We purchase products anonymously, verify certificates of analysis against independent lab results, and survey real customers. No vendor can pay to improve their ranking.
Affiliate Disclosure: Synthalab may earn a commission when you purchase through vendor links on this page, at no additional cost to you. This does not influence our rankings or reviews — all evaluations are conducted independently. All peptides are sold for research purposes only and are not intended for human consumption. Consult a licensed physician before beginning any peptide therapy.