Independent side-by-side comparison of BioTech Peptides and Reta-Peptide — third-party lab grades, tested purity, COA availability, FDA warnings, and community ratings.
Bottom line: Reta-Peptide holds the stronger independent lab grade (ungraded vs D); Reta-Peptide has more published third-party tests (19 vs 0); BioTech Peptides carries more community reviews (567).
Every figure below is either measured by an independent laboratory or read from the vendor's own website, and the source is named against it. PeptideAtlas is not affiliated with either vendor.
BioTech Peptides has no independent Janoshik assays on file. Reta-Peptide: 19 independent Janoshik assays, across 17 substances, median measured purity 99.6%, most recent 2025-11-20.
| Attribute | BioTech Peptides | Reta-Peptide |
|---|---|---|
| Independent lab grade | Not graded | D |
| Third-party tests | None published | 19 tests, avg purity 99.5% |
| Community rating | 4.4/5 (567 reviews) | No reviews |
| COA available | Yes | No |
| Endotoxin tested | No | No |
| FDA warnings | None on record | None on record |
| Year established | 2016 | Unknown |
| Substance | BioTech Peptides | Reta-Peptide |
|---|---|---|
| Tesamorelin | Not tested | 99.34% (2 assays, latest 2025-11-19) |
| Tirzepatide 60mg | Not tested | 99.83% (2 assays, latest 2025-04-18) |
| KLOW (ghk Or Ghk-cu/ Tb-500/ Bpc-157/ Kpv) | Not tested | purity not reported (1 assay, latest 2025-11-20) |
| Bpc-157/tb-500 Blend | Not tested | purity not reported (1 assay, latest 2025-11-20) |
| Cjc-1295 With DAC 5 | Not tested | 98.28% (1 assay, latest 2025-11-19) |
| Cagrilintide | Not tested | 99.34% (1 assay, latest 2025-11-19) |
| Semaglutide | Not tested | 99.62% (1 assay, latest 2025-11-19) |
| Retatrutide | Not tested | 99.48% (1 assay, latest 2025-11-19) |
| Tirzepatide | Not tested | 99.86% (1 assay, latest 2025-11-19) |
| Tirzepatide 30mg | Not tested | 99.78% (1 assay, latest 2025-07-22) |
| Tesamorelin 10mg | Not tested | 99.08% (1 assay, latest 2025-07-19) |
| Cagrilintide 10mg | Not tested | 99.66% (1 assay, latest 2025-07-19) |
| Checked | BioTech Peptides | Reta-Peptide |
|---|---|---|
| Certificates of analysis | 41 published on the site | None found on the site |
| Products listed | 89 | 35 |
| Public pricing | Listed on the site | Listed on the site |
| Payment methods | Credit Card | Cryptocurrency, Bank Transfer |
| Ships to | United States, Worldwide | United States, United Kingdom, Canada, Australia, New Zealand |
| Carriers | Not stated | DHL, FedEx, UPS, USPS |
| Research-use-only notice | Published | Not stated |
| Stated origin | Not stated | China |
Reta-Peptide. BioTech Peptides has no independent Janoshik assays on file. Reta-Peptide: 19 independent Janoshik assays, across 17 substances, median measured purity 99.6%, most recent 2025-11-20. These are third-party Janoshik assays published against the vendor, not the vendor's own certificates.
BioTech Peptides publishes 41 certificates of analysis on its own site, and we found no certificates of analysis anywhere on Reta-Peptide's site. A published COA is the vendor's own document; the assay figures elsewhere on this page are independent of it.
BioTech Peptides states it ships to United States, Worldwide, and Reta-Peptide states it ships to United States, United Kingdom, Canada, Australia, New Zealand. Both are read from the vendors' own sites.
Full profiles: BioTech Peptides, Reta-Peptide.
Full lab-test records: All 19 Reta-Peptide lab tests.
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