Peptide RankingPure Peptide Labs vs QSC
Pure Peptide Labs scores higher, 74 to 51. The widest gap is documentation depth. Same formula, same data fields, October 2026.
Factor by factor
| Factor | Pure Peptide Labs | QSC | Edge |
|---|---|---|---|
| Testing & certificates | 89 | 39 | Pure Peptide Labs |
| Documentation depth | 83 | 0 | Pure Peptide Labs |
| Transparency | 86 | 96 | QSC |
| Track record | 19 | 57 | QSC |
| Catalog | 71 | 71 | Even |
| Pricing | 50 | 70 | QSC |
| Ordering & service | 70 | 25 | Pure Peptide Labs |
Fact sheets side by side
| Pure Peptide Labs | QSC | |
|---|---|---|
| Overall score | 74/100 (#5) | 51/100 (#27) |
| Status | Operating | Operating |
| Based in | Cedar Park, TX | Qingdao, Shandong |
| Founded | 2024 | 2008 |
| Third-party testing | Yes | Limited |
| Laboratories named | Freedom Diagnostics, Kovera Labs, MDx BioAnalytical Laboratory, Precision Mass Spec | Janoshik Analytical Laboratories |
| Public certificates | Yes | Not verified |
| Lot-specific certificates | Yes | Not verified |
| Formats | vials, blends | vials, bulk |
| Catalog size | ≈63 | ≈75 |
| BPC-157 5 mg listed price | — | — |
| Free shipping from | $0 | — |
| Payments | card, ach | crypto, wire |
| Ships internationally | No | Yes |
| Research-use disclaimer | Yes | Yes |
| FDA warning letter | None found | None found |
Read the full reviews: Pure Peptide Labs review · QSC review. Both suppliers sell materials labeled for laboratory research use only.
The factor that separates them
The widest gap is documentation depth (83 vs 0). What that factor measures is explained in how to read a certificate of analysis and lot-level vs sample testing.
Related comparisons
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Frequently asked questions
Which is better, Pure Peptide Labs or QSC?
On our formula Pure Peptide Labs scores higher (74 vs 51). The largest gap is in documentation depth (83 vs 0). "Better" depends on what you weight; both fact sheets are on this page.
Do both publish certificates of analysis?
Pure Peptide Labs: yes. QSC: not verified. Lot-specific certificates — Pure Peptide Labs: yes; QSC: not verified.
Which is cheaper?
We could not compare a like-for-like listing; price tiers are unknown (Pure Peptide Labs) and budget (QSC).