Excellent
Based on 36 reviews
Sigma4.5Honesty, 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 Folks Told, with an average rating of 4.5 out of 5.
36 approved reviews, newest moderated first
Jodie J.
One of the best customer service experiences I have had in a long time. There was a slight error in the order and someone reached out immediately to verify the proper order! Im so thankful! Great customer service, Sigma!! Thank you!
lynette fradera G.
Fast shipping, excellent customer service agents, very personalized experienced, the best prices on market and wide variety to choose from.
Toxic free C.
This is an excellent company all the way around, from ease of use on the website, multiple payment options, excellent products excellent customer service. A great resource for your Peptide needs.
Tamara R.
I’ve had a great experience with Sigma Peptides. Not only have their products been very good, but their customer service has been outstanding as well. Any time I’ve reached out with questions or concerns, their team has been quick to respond, helpful, and professional. I recently experienced an issue with a product, and they handled it promptly. They reviewed the situation and quickly sent a replacement without giving me the runaround, which I really appreciated. While issues can happen with any company, what matters most is how they’re handled. Sigma Peptides has consistently stood behind their products and provided excellent support throughout the process. The quality of the products, combined with responsive customer service, has given me confidence in continuing to do business with them. I highly recommend them based on both product quality and customer experience.
Sandra V.
Very kind good comunication Thank you for the safe and fast shipping.5✨
A
You will never receive your order so don’t bother wasting your money.
Reply from SigmaJun 16, 2026
Of course, you would not receive anything from us: 1- You have never placed an order. 2- You are based in the UK 3- We do not serve clients in the UK or ship there. 4- If you feel wronged, just call your CC provider and dispute the charge. This is how we do it in the US to deal with scammers. May you ought to start doing things like that in the UK.
Amber R.
Website is easy to navigate and great deals on GLP-2
kathy L.
I like that the company offers frequent promotions, has a good quality product (GLP-1). The company reps (Stephanie and Max) have gone out of their way to help me with personal phone calls, discounts and their time....even on the weekend. I appreciate this kind of attention and service. I am a loyal customer for several years now and will stay with Sigma in the future.
