Guru Peptides Review: Testing, Catalog & Shipping
Key facts
- Catalog
- Lyophilised peptide vials at stated mg weights, plus liquid SARMs and research chemicals sold by mg-per-ml, and lab consumables
- Third-party testing
- BT Labs & MZ Biolabs
- Certificates of analysis
- A dedicated third-party results page listing 18 batch reports — 14 current and 4 previous — each with product, batch number, test date, laboratory, purity and a linked certificate
Guru Peptides is a US research-supply vendor shipping from a single domestic warehouse. It publishes a dedicated third-party results page rather than scattering certificates through product galleries, which is the more checkable of the two arrangements. Prof. Peptide holds no discount code for Guru — the vendor issues none to affiliates — so the link below carries attribution only and no saving.
The catalog is broader than a peptide catalog. Guru sorts it into Peptides, SARMs, Catalog Chemicals, Bulk Chemicals and Lab Equipment, and only the first is within Prof. Peptide's scope. Peptides are sold as lyophilised vials at stated mg weights; the SARMs and chemicals lines are liquids priced by mg-per-ml. Among the compounds named on the vendor's own listings and certificates:
- Metabolic & GLP-1
- Semaglutide, Tirzepatide, Retatrutide, MOTS-c, 5-Amino-1MQ, HGH Fragment 176-191
- Growth Hormone
- CJC-1295, Tesamorelin, Ipamorelin, GHRP-2, MK-677
- Skin Health & Anti-Aging
- GHK-Cu, Melanotan II
- Gut Health & Immunity
- KPV
Three of the peptide listings carry coded names rather than compound names: Guru sells “GLP-1 (S)”, “GLP-2 (T)” and “GLP-3 (R)”. All three decode on Guru's own evidence rather than by inference — each product's certificate filename names the compound outright (Semaglutide, Tirzepatide and Retatrutide respectively), and the batch prefixes on the results table corroborate it (SM, TZ and RT). That is the vendor's own document naming its own product, which is the strongest tier of decode evidence Prof. Peptide recognises.
The rest of the store sits outside what Prof. Peptide covers. Guru's SARMs line runs to GW-501516, LGD-4033, MK-2866, RAD-140, S23, S4 and SR9009, and its chemicals line includes anastrozole, clomiphene, exemestane, cabergoline, finasteride, clenbuterol, liothyronine and avanafil. Prof. Peptide profiles none of those, prices none of them and makes no claim about them; they are named here only so the catalog is described accurately rather than as though it were peptides alone.
Third-party testing
Guru publishes a dedicated 3rd Party Test Results page rather than burying certificates in product galleries. It lists 18 batch reports — 14 marked current and 4 marked previous — as a searchable table giving, for each, the product, the batch number, the test date, the laboratory, a result summary and a link to the certificate itself.
The 14 current reports are all attributed to BT Labs and all dated 20 August 2026. Each links a signed PDF hosted on Guru's own domain whose filename carries the laboratory report number, the compound and the batch — for example COA261078-001-PPI-Guru-Peptides-BPC-157-BP00817-5mg_signed.pdf. The reports are described as covering purity by HPLC and identity by FTIR. The 4 previous reports are attributed to MZ Biolabs, dated April 2024, and cover SARMs rather than peptides.
What Prof. Peptide has not done. BT Labs operates a public verification portal at verify.btlabtesting.com, keyed on the report number printed on each certificate, and Guru's report numbers match the format it asks for. That portal is protected by a Cloudflare Turnstile challenge which did not clear on its own, and Prof. Peptide does not complete CAPTCHAs. No report number has therefore been checked against BT Labs' own records. Everything above is read from the certificates the vendor publishes, which is a weaker tier of evidence than a laboratory-side confirmation, and the laboratories are recorded as claimed rather than verified for that reason.
One further caveat belongs with the batch numbers: the results table and the certificate filename disagree for at least one product, where the table gives KPV005 and the filename gives KP0005. Prof. Peptide reports both rather than picking one.
Shipping, payment and returns
Guru states it operates one warehouse, in the United States, and that facilities in Canada and Europe are being set up. Orders are stated to ship within 24 hours of payment, with 48 hours allowed for orders outside the USA, and tracking is provided by USPS in the confirmation email.
Guru does not accept credit cards. Its published payment methods are Apple Pay, Venmo, Google Pay, Cash App, Walmart-to-Walmart and Western Union. Its FAQ states plainly that orders are not refunded once shipped, and that cancellation is only possible before despatch. A purchaser must be 18 or over.
Guru states that all of its products are manufactured within the United States by registered biotechnology companies. It names no manufacturer.
What is not published
No certificate covers every catalog line: 18 reports across a store of several dozen products means most products have no published certificate of their own. No shipping cost, free-shipping threshold or delivery estimate beyond the despatch window is published. No laboratory accreditation document is published for either laboratory named. And no company address or corporate entity appears on the site beyond the single US warehouse it describes.
Prof. Peptide checked Trustpilot and Finnrick on 30 September 2026.