Vendor profile
Research · US · 6 years
Peptide Partners
A
Composite 8.4 / 10
Last updated 2026-04-29. Composite is computed from the live database; missing sub-scores redistribute weight across the others.
Lab quality
8.2
Strong
Sentiment
8.2
Strong
COA
8.0
Per-batch
Reliability
7.6
6y tenure
Pricing
—
Phase 2
Editorial summary
Peptide Partners ranks A overall on 71 lab tests across 7 peptides, with the Ipamorelin line (avg 9.9 across 7 tests) and Retatrutide line (avg 8.8 across 19 tests) carrying the score. Per-batch COAs are published with HPLC and mass spec; customer satisfaction sits at 4.8/5 across 24 aggregated reviews. The CJC-1295 line (avg 6.7) is the only meaningful weak spot.
Generated by TriedRx editorial system (claude-haiku-4-5) · 2026-04-28. Reviewed quarterly.
Peptide breakdown
| Peptide | Score | Lab quality | Tests | Purity | Qty var. | $/mg verified | Last test | Ranking |
|---|---|---|---|---|---|---|---|---|
| Ipamorelin | 9.9A |
9.9 | 7 | 99.7% | ±3% | $1.40 | 2026-02-15 | view |
| Retatrutide | 8.8B+ |
8.8 | 19 | 99.9% | ±10% | $3.50 | 2026-04-23 | view |
| Tirzepatide | 8.2C |
8.2 | 6 | 99.0% | ±42% | $2.40 | 2025-10-03 | view |
| TB-500 | 8.1A |
8.1 | 11 | 98.7% | ±7% | $2.10 | 2026-03-04 | view |
| BPC-157 | 8.0A |
8.0 | 7 | 98.9% | ±5% | $0.79 | 2026-03-04 | view |
| Tesamorelin | 7.8B+ |
7.8 | 11 | 98.4% | ±14% | $2.80 | 2026-02-20 | view |
| CJC-1295 | 6.7C |
6.7 | 9 | 97.6% | ±19% | $1.85 | 2026-02-15 | view |
COA transparency
- ✓ Publishes per-batch COAs (not just one COA for everyone)
- ✓ Both HPLC and mass spec shown
- ✓ Endotoxin or sterility data shown
- ○ At least one COA independently cross-checked (pending)
- ✓ Most recent COA within 90 days (2026-04-23)
Pricing
| Peptide | List $/mg | Verified $/mg | Market median | vs market |
|---|---|---|---|---|
| Ipamorelin | $1.40 | $1.40 | $1.55 | −10% |
| Retatrutide | $3.85 | $3.50 | $3.20 | +9% |
| Tirzepatide | $2.40 | $2.40 | $2.55 | −6% |
| TB-500 | $2.10 | $2.10 | $2.45 | −14% |
| BPC-157 | $0.83 | $0.79 | $0.95 | −17% |
| Tesamorelin | $2.95 | $2.80 | $2.95 | −5% |
| CJC-1295 | $1.85 | $1.85 | $1.95 | −5% |
Lab test history
Aggregated from independent testing programs and vendor-published COAs.
| Peptide | Date | Score | Label | Tested | Purity | Method | Source |
|---|---|---|---|---|---|---|---|
| Retatrutide | 2026-04-23 | 9.6 | 24mg | 22.5mg | 99.90% | HPLC + MS | — |
| TB-500 | 2026-03-04 | 7.1 | 10mg | 10.7mg | 98.73% | HPLC + MS | — |
| BPC-157 | 2026-03-04 | 7.2 | 10mg | 10.7mg | 98.87% | HPLC + MS | — |
| Retatrutide | 2026-03-03 | 7.0 | 30mg | 23.6mg | 99.90% | HPLC + MS | — |
| Retatrutide | 2026-03-02 | 9.3 | 24mg | 22.3mg | 99.90% | HPLC + MS | — |
| Ipamorelin | 2026-02-15 | 9.8 | 5mg | 5.0mg | 99.74% | HPLC + MS | — |
All vendor grades, side-by-side
Compare Peptide Partners against every other vendor in the grade hub →
Top-5 ranked vendors per peptide, plus the highest-rated vendors overall. Daily refresh.