“Please choose a different carrier for delivery. FedEx is the worst. They are notorious for late and lost orders. It’s been one week and still haven’t received my order.”
“I am so happy that I found a place where I can order my peptides and feel 100% comfortable as to the price, the safety and the quality. I will continue to order from this company. Thank you Cert-Pep !! Linda E”
“Very solid customer service and very good products. I've purchased from them several times and will continue to do so. Absolutely would recommend and in fact I have to a number of my friends.”
“My experience with customer service was fantastic! When I opened my NAD, I noticed that the powder looked strange. I promptly informed customer service, and they replaced all four vials. Thanks, Jason and Sarah! !”
“Spoke with Christiana. Package was delayed in transit for 5 days and Reta was not kept at suggested temp as found on their website. Christiana just kept saying it was fine despite different info on their website. Refused to refund, replace or discount despite compromise in efficacy.”
“The team at Certified Pep has been really helpful in getting my order to me considering the bad weather we've been experiencing in the Midwest. I appreciate how responsive and helpful they've been!”
“I’ve purchased from Certified Peptide multiple times, and it has been the best experience I’ve had across any research peptide supplier.
Why I trust them:
• Quality: Consistent, high-purity products with clear Certificates of Analysis. Everything matches specs.
• Transparency: Clear sourcing, documentation, and usage guidelines. No ambiguity.
• Customer experience: Responsive, knowledgeable support that actually answers questions.
• Shipping: Fast, reliable, well-packaged, and temperature-appropriate.
• Education: Their instructions and research guidance are better than anything I’ve seen elsewhere—clear, thorough, and professional.
I’ve tried several peptide vendors over the years. None come close to the combination of quality, transparency, and professionalism that Certified Peptide delivers.
It’s disappointing to see a company with such a strong track record lose visibility due to platform or industry pressure, because my direct experience has been consistently excellent. There’s a reason they were number one on Trustpilot. If reviews matter, this one is earned.
Highly recommended.”
