“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.”
“Very professional organization. Really appreciate the constant communication regarding my order and the fast shipping. Everything was top notch from browsing the website and placing the order. Will definitely be ordering again - nice to have found this company and not have to scrub the internet for for all of my peptide requirements. Cheers!”
“Ordering was easy. I love the fact they have real people to answer questions. Phone numbers and emails. Product is legit. Love the testing it goes through. Will definitely be ordering from here again”
“shipping was quick. surprised that was sent business card, QR code for help and even a syringe in packaging. I was scared that this site wasn't legit, but seems to be. great prices, too..”
“Order processed same day and delivered within just a few days. Very happy with our peptides so far. Happy to have found a reliable and trustworthy company that has the GLP3 available. Working great so far.”
“I am on my 3rd order and I will continue to work with these guys. Prices are reasonable and they'll throw a coupon my way here and there;) I appreciate how they package the order, ensures they will arrive safely. Access to documentation is a plus. Overall, I am very pleased and happy with the product quality and they have a great website.”
“Initially had an issue with my order being delivered.... reached out to you and it was solved immediately. A replacement order was sent out. Loving the results so far”
“These guys ROCK!!
I'm new here and have only placed two orders so far. The main reason I chose Certified Prep was the 1,500 reviews on Trustpilot. But that doesn’t matter anymore, because I’m here now and they’re not. Certified Prep is an excellent company, and the quality of their products and services is second to none. I am totally at ease doing business with them, and I am confident that I’m getting what I'm paying for...
Love these guys..”
“Hey, I just want to add thank you certified peptide…. This is my favorite company. I wouldn’t wanna deal with any other company….. These people are very informative… they’re very caring. Their customer service is like no other….. the second you ask a question you get a real response within seconds…. This company has done nothing but build a better quality of life for me. And for other I think what they’re doing. Is amazing. And I support them 1000%. And this is just an honest review.”
“Incredibly attentive by responding in real time to any questions, issues or concerns. I've researched their products about a year ago and was pleased with the research results. This has to be one of the best to purchase from. Quality products, trustworthy and safe. I really appreciate the nice touch in my delivered packages - a small gift. Thank you so much to Christina & Rebecca for your responsiveness and attention to detail.”
“Not only did I receive my medication, but also quite a bit of information on dosage and real people to answer questions you might have. Love this company!”
“Easy to navigate and order process ran smooth. Certified Pep came highly recommended by trusted friends. Order updates and delivery was fast. Would definitely recommend.”
