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Certified Pep

Reviews and discussions for Certified Pep. To submit a review, visit peptidecritic.com/submit-review

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March 2026 Contest
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  • Community Alert - Threatening customers

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    @MyB Did not see the vendor he quoted.. My bad. Thank you
  • Certified Pep User Review: weird side effect

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    4.00/5 | Reviewed November 23, 2025 Peptide: GHK-Cu The peptide seems to be working but i started getting skin irritations more often(it may not be the vendors fult) View original review on PeptideCritic Reply below to discuss this review or ask the reviewer questions.
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    3.00/5 | Reviewed November 20, 2025 Peptide: GLP3-R This company is average at best. They do some things well and others not so well. They are middle of the road on pricing. I paid $320 for 40mg of Retatrutide. I also bought some SS-31 and Tesamorelin. They get your order shipped fast but they use USPS. For the $15 shipping charge, I would like to see some Fedex or UPS 2day air like some other venders offer. They regularly offer discount codes if you sign up for their email offers. I have received 2 25% off codes for weekend sales. If you want a discount, wait until Saturday to buy. The Retatrutide seems to be okay. I am still conducting research on the other two compounds that I purchased. They send goodies with your order. I received business cards from their customer service team, alcohol swabs, and a 3ml luerlock syringe for reconstitution. They also offer a great website with information on dosing protocols. To be honest, this would probably be a 4 or 5 star review if it wasn't for one major issue. Batch test information. I received both of my orders and the cap colors did not match the vials in the COAs on their website. I reached out to them twice about this. Once through their website chat and once via email. I requested the COA that matches the product that they sent me and explained my situation. Because the vials do not have a batch number, the cap color is all I have to go off of. They have not gotten back to me. Although the shipping is decent, the product seems good, the prices are right, they offer dosing information, and they give you some goodies, I cannot overlook the fact that they seem to just be skipping out on their batch testing and lying about it on their website. This is why they get 3 stars. I hope they fix this. This company really has potential. View original review on PeptideCritic Reply below to discuss this review or ask the reviewer questions.
  • Certified Pep User Review: Great Tirz

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    5.00/5 | Reviewed November 14, 2025 Peptide: GLP2-T I bought a 10-pack (kit) of 30mg Tirz from Certified Pep. I sent one vial out for independent testing (at my own cost) and it came back at 30.2mg and 99.76% purity. I've been using it for a few months and it works great. I recommend this vendor. View original review on PeptideCritic Reply below to discuss this review or ask the reviewer questions.
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    3.00/5 | Reviewed September 16, 2025 Peptide: SS-31 The only disappointing part of my transactions is that all COA’s are from the Manufacturer. None of the testing is done by Cert Pep. View original review on PeptideCritic Reply below to discuss this review or ask the reviewer questions.
  • Certified Pep User Review: Too Expensive No Batch Numbers

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    1.00/5 | Reviewed September 11, 2025 Peptide: GLP2-T View original review on PeptideCritic Reply below to discuss this review or ask the reviewer questions.