SigmaWe 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 Five Star Index, with an average rating of 4.5 out of 5.
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A
You will never receive your order so don’t bother wasting your money.
Response 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.
C.
THIS WEBSITE USES THE NAME SIGMA SINCE OTHER REPUTABLE SITES HAVE SIMILAR NAME ,BUT THE PRODUCTS ARE FAKE. Their retatrutide is false, it doesn't work, the worst part is not knowing what you are putting in your body. They are from Colombia, and they had a facebook page with some good reviews, probably from themselves, AND NOW THE PAGE IS CLOSED. Do not buy anything from them. AND they dont reply emails.
Response from SigmaMay 10, 2026
Thank you for the review, but the claims here don't match any of our records and warrant a direct response. 1. We are a US-based company and ship exclusively from US fulfillment centers. Domestic delivery is 2-3 business days, which would be physically impossible from Colombia. Our shipping records, tracking numbers are all verifiable. 2. Every product we ship has a Certificate of Analysis (COA) displayed publicly on each product page. These are third-party HPLC test results, not internal claims. 3. We have a real, monitored support inbox at [email protected] that responds within 24 hours, often the same day. We are happy to look up any order under this name and address it directly. If you have a genuine order with us, please share your order number (privately or via support) and we will investigate immediately. If you don't have one, we'd ask you to consider that posting unverified claims about a business you have not transacted with is what Trustpilot's policy considers a violation. — Sigma Peptides Team
