Allison M.
Posted
Amazing customer service
Amazing customer service, Max went above and beyond! Plus amazing products! Thank you!

Excellent
36 reviews
Honesty, pricing, process and quality scores appear once 5 customers have rated them.
We are a trusted research supplier committed to delivering high-quality products for laboratories, academic institutions, and independent researchers. Every product is validated through rigorous third-party testing and accompanied by advanced Certificates of Analysis (COAs), ensuring accuracy, reliability, and full transparency. Our dedicated customer support team and fast, dependable shipping provide a seamless experience from order to delivery. As a leading provider in the research field, we uphold strict standards of consistency, uncompromising quality, and exceptional service—empowering you to advance your work with complete confidence.
Sigma (sigmapeptides.com) has 36 customer reviews on Rated Honest, with an average rating of 4.5 out of 5.
36 approved reviews, newest moderated first
Allison M.
Posted
Amazing customer service, Max went above and beyond! Plus amazing products! Thank you!
Karissa W.
Posted
Used to be easy to order. Now, not so much. I love the product, and love the results. I have tried to place an order today, and am unable to complete the order. I have been a customer for quite sometime.
Lisa
Posted
The first time I ordered everything was great. NowI have been trying to order for over a week and the site will not allow me to
Sodalis R.
Posted
A great expeeience. Thank you for help me
Alexis L.
Posted
Tienen buen precio en los partidos y es facil el proceso de pago
alexismtbw
Posted
I bought Glow Blend peptides and works great, I'm suffering epicondilitis bilateral in the right elbow with too much pain by 6 months, in the past 4 days using it I feel great.
E Victoria L.
Posted
Reliable company have been using for over a year now. Great prices and fast shipping.
Response from Sigma· May 24, 2026
Thank you for your trust. Looking forward to work with you for years to come.
William De L.
Posted
Please contact me in trying to see if my products have been dispatched but cannot contact Vicky or Cathy