Ki PeptidesKi Peptides is a US-based supplier of research peptides and related compounds, sold only as chemical reagents for in-vitro laboratory research. We post certificates of analysis from third-party laboratories on our product pages. Each certificate shows the lot number, HPLC purity and a mass-spectrometry identity test.We ship within the United States and answer questions about orders and lab documentation at [email protected]. All orders come with a 30-day money-back guarantee.
Ki Peptides (kipeptides.com) has 17 customer reviews on Five Star Index, with an average rating of 5.0 out of 5.
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Research & Development · Wyoming
Excellent
Research & Development · Denver, Colorado
Excellent
Research & Development · ST PETERSBURG, Florida
Excellent
Research & Development · Washington, District of Columbia
Excellent
17 approved reviews, newest moderated first
Ryan L.
I have dealt with alot of companies saying alot or charging alot. KI Peptides are a solid product with some cost benefits that really help your body and pockets. Thank you for letting our family trust your products!
Response from Ki PeptidesOct 23, 2026
Thank you, Ryan. We appreciate your family's trust in us.
S
Prompt communication, fast shipping, and everything is exactly as ordered
Response from Ki PeptidesOct 5, 2026
Thank you for the review. We're glad communication was prompt, shipping was fast and everything arrived exactly as ordered.
Rgtina H.
Todo excelente! Muy buena calidad. Tienen todo en inglés y español. Voy a seguir ordenando de aquí!
Response from Ki PeptidesOct 5, 2026
¡Gracias, Rgtina! Nos alegra que la página en español te sea útil. Aquí estaremos para tu próximo pedido.
Jason S.
Very responsive customer service. Fast delivery. I’m def a happy customer and will recommend. I’ve tried several peptide companies and some come off shady, not this company.
Response from Ki PeptidesOct 5, 2026
Thank you, Jason. We're glad our support answered quickly and delivery was fast, and we appreciate your trust and the recommendation.
Ricky C.
Had a lingering achilles issue completely gone after 4 week cycle.
Response from Ki PeptidesSep 29, 2026
Wow, just from research? That's amazing.
Jenna C.
I’ve had the best experience with KI Peptides and wanted to share because finding a peptide company that feels trustworthy and easy to navigate can be surprisingly difficult. The website is easy to use and I love how much info is provided about the different peptides plus the research behind them. I’m someone who likes to know what I’m buying and do my own research so having all that information in one place has been really helpful. I’ve personally used retatrutide and have been really happy with my experience. It’s helped me get more lean and feel more confident. On top of that, the prices are fair compared with what I’ve seen elsewhere. Beyond happy to have found this company!
Response from Ki PeptidesSep 29, 2026
Thank you for your trust and taking the time to share about it! Thnak you Jenna!
DC C.
I really enjoyed the peptides. It was very easy to order online. He was very helpful and explained everything to me. I have definitely recommend this company to anyone very easy.
Response from Ki PeptidesSep 8, 2026
Chris thanks for the love!
Bobby B.
Awesome product! Quick turn around and plenty of advice and help when needed ! This is the real deal 💪
Response from Ki PeptidesSep 7, 2026
Happy your happy!