Sigma Compounds is a research peptide vendor - also called a supplier or source - indexed on PeptideScouter. Prices below are refreshed daily.
Sigma Compounds sells from its own storefront at sigmacompounds.com, and its terms of service name Kansas law and courts for disputes. The catalog spans the common research categories, from incretin agonists such as retatrutide and tirzepatide, sold under in-house product codes, to repair peptides like BPC-157 and TB-500, along with blends. Beyond lyophilized vials it carries nasal sprays, oral products and liquid B12 and L-carnitine. The vendor states its products are third-party tested. Its on-site COA library lists each published certificate with the testing lab, report date and HPLC purity, and product pages link the certificate for that product. Some certificates add endotoxin, microbial and fentanyl screens to purity and identity. All sales are final unless an item arrives damaged or differs from what was ordered, which should be reported to customer service right away.
As of Nov 6, 2026, Sigma Compounds' newest COAs for retatrutide, tirzepatide, tesamorelin, MOTS-C and BPC-157 report 6 of 8 tests on average, run by Freedom Diagnostics.
| Peptide | Lab | Report date | Tests | |
|---|---|---|---|---|
| Retatrutide30 mgMicrobial by PCR. | Freedom Diagnostics | Retatrutide 30 mg Reported on this COA
| View COA | |
| Tirzepatide20 mgMicrobial by PCR. | Freedom Diagnostics | Tirzepatide 20 mg Reported on this COA
| View COA | |
| Tesamorelin10 mg | Freedom Diagnostics | Tesamorelin 10 mg Reported on this COA
| View COA | |
| MOTS-C20 mgMicrobial by PCR. | Freedom Diagnostics | MOTS-C 20 mg Reported on this COA
| View COA | |
| BPC-15710 mgMicrobial by PCR. | Freedom Diagnostics | BPC-157 10 mg Reported on this COA
| View COA |
Counts tests reported on the vendor's COAs, not their results. How this is counted →
PeptideScouter does not rate Sigma Compounds or any other vendor, so here are the facts we can see. Its domain was registered on Oct 10, 2023. Its Trustpilot score is 4.8/5 from 126 reviews. As of Nov 6, 2026, Sigma Compounds' newest COAs for retatrutide, tirzepatide, tesamorelin, MOTS-C and BPC-157 report 6 of 8 tests on average, run by Freedom Diagnostics. We track 40 of its peptides across 61 listings and refresh prices daily. We do not test products or confirm that a vendor's COAs are genuine. Sigma Compounds pays us a commission on orders from our links or code, and no vendor can pay for its listing, its place in our price tables or its lab testing count.
Sigma Compounds is based in the US according to their published vendor information.
Sigma Compounds ships within the United States only. International shipping is not currently offered.
Sigma Compounds accepts Credit Card for payment.
Sigma Compounds offers free shipping.
As of Nov 6, 2026, Sigma Compounds' newest COAs for retatrutide, tirzepatide, tesamorelin, MOTS-C and BPC-157 report 6 of 8 tests on average, run by Freedom Diagnostics. On all 5: identity, purity and net content. On 4 of 5: endotoxin, sterility or microbial, and fentanyl. On 3 of 5: conformity. On none: heavy metals. We count the tests printed on each COA and link the COAs on this page. We do not run tests ourselves, and the count says nothing about the results.
Sigma Compounds currently lists 40 research peptides across 10 categories on PeptideScouter, with 61 tracked listings including size and kit variants. Pricing is normalized to USD per milligram and refreshed daily.
Yes. Sigma Compounds issues PeptideScouter the code PEPTIDESCOUTER, worth 10% off, entered in the discount or promo code field at checkout. It applies across their catalog rather than to one peptide, and it is an affiliate code: Sigma Compounds pays PeptideScouter a commission on orders that use it, at no additional cost to you. The Sigma Compounds coupon code page shows what the discount does to every peptide they stock, normalized to USD per milligram.
