Extreme PeptidesExtreme Peptides supplies peptides and research liquids for laboratories and qualified investigators. Our focus: clear specifications, batch consistency, and reliable fulfillment—supported by a responsive team that understands lab needs.
Extreme Peptides (extremepeptides.com) has 151 customer reviews on Five Star Index, with an average rating of 3.0 out of 5.
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Eunice K.
Your method of packaging your peptide was done with minimal protection of heat. It was shipped USPS and your method was to wrap in bubble wrap. The peptides have sat in the mailbox in the full sun all day . The powder is solidified and possibly damaged
DISAPPOINTED
I order retatrutide from Extreme Peptides. I have been using it for 4 weeks, and I have not felt any decrease in appetite or food noise. I have not lost a single pound. I do not believe this is true retatrutide.
Zev L.
Hello. I recently purchased retatrutide and melanotan from your site. I have used both of these compounds from peptide sciences numerous times so i am fully aware of how I respond to both compound. I am on day 3 of taking your Reta 20mg and melanotan. Neither are doing anything. Dosing Reta @4mg Which usually makes me struggle to eat ANYTHING. My appetite is absolutely normal on your compound. And I haven’t lost a pound I lost 35 pounds in 2 months on peptide sciences gear. Please respond. I’ve spent a lot of money on your site and feel like you sold me fake gear.
Karlyn
Whatever I purchased must be fake because I started at a very low dose and and slowly moved up and I’m having insane food cravings, terrible bloating, and have actually gained weight
Chris M.
Placed an expensive order and was never shipped, still shows as processing after 5 months, no response from company, but they still send promotional emails.
Response from Extreme PeptidesAug 22, 2025
Hi Chris we rectified the issue with most past clients it was the shippers not doing their job and USPS also losing packages. Send an email to the help desk if we didn't refund you for the purchase we will give you store credit + some. We have a new shipping company and things are a lot smoother now.
zac R.
I recently ordered a variety of peptides. I've had 2 successful orders with the company, so figured I would make a larger one this time. I was supposed to receive 1x Melanotan II, 1x Oxytocin, 1x PT-141, 4x Selank, and 2x DSIP. Instead I simply received one of each of the peptides, leaving me short 3x Selank ($50 each) and 1xDSIP ($30 each) for a total of $180 missing from my order (plus the tax and shipping). I sent messages on the website, via email, and have called as well, but to date, no response. I truly hope they reach out to make the order fully complete and I get to change this review accordingly, but with the current lack of communication from their company, I am not sure that will take place.
Response from Extreme PeptidesAug 22, 2025
Hey Zac, Looking at my records you received the missing products on May.13th we shipped it out as soon as we realized it was missing some products. can you confirm?
Richard H.
Same as everyone complaining about shipping label created on 7/8/24 and nothing! No active phone number, do not reply to Customer service email s at all. Going to call my credit card company to return my money. Then will file a police report for fraud since I only live 20 minutes from them. Anything over $300 dollars is grand theft. They at least need to respond. So you her what you get. Never again! Still running sales too! Ridiculous
Will C.
I placed an order on June 20th. It’s been almost two weeks, and I still have not received the order. I also check the tracking number. It says label created, USPS awaiting item. It means it’s been sitting in the store the whole time!!
