Head to head · October 2026
American Research Pens vs Pure Peptide Labs
Pure Peptide Labs scores higher, 74 to 43. The widest gap is documentation depth. Same formula, same data fields, October 2026.
43/100
Factor by factor
| Factor | American Research Pens | Pure Peptide Labs | Edge |
|---|---|---|---|
| Testing & certificates | 33 | 89 | Pure Peptide Labs |
| Documentation depth | 25 | 83 | Pure Peptide Labs |
| Transparency | 66 | 86 | Pure Peptide Labs |
| Track record | 11 | 19 | Pure Peptide Labs |
| Catalog | 45 | 71 | Pure Peptide Labs |
| Pricing | 50 | 50 | Even |
| Ordering & service | 82 | 70 | American Research Pens |
Fact sheets side by side
| American Research Pens | Pure Peptide Labs | |
|---|---|---|
| Overall score | 43/100 (#32) | 74/100 (#5) |
| Status | Operating | Operating |
| Based in | US | Cedar Park, TX |
| Founded | Not stated | 2024 |
| Third-party testing | Limited | Yes |
| Laboratories named | None named | Freedom Diagnostics, Kovera Labs, MDx BioAnalytical Laboratory, Precision Mass Spec |
| Public certificates | Not verified | Yes |
| Lot-specific certificates | Not verified | Yes |
| Formats | pens | vials, blends |
| Catalog size | ≈10 | ≈63 |
| BPC-157 5 mg listed price | — | — |
| Free shipping from | $250 | $0 |
| Payments | card, wire, ach, e-check, crypto | card, ach |
| Ships internationally | No | No |
| Research-use disclaimer | Yes | Yes |
| FDA warning letter | None found | None found |
Read the full reviews: American Research Pens · Pure Peptide Labs. Both suppliers sell materials labeled for laboratory research use only.
Frequently asked questions
Which is better, American Research Pens or Pure Peptide Labs?
On our formula Pure Peptide Labs scores higher (74 vs 43). The largest gap is in documentation depth (25 vs 83). "Better" depends on what you weight; both fact sheets are on this page.
Do both publish certificates of analysis?
American Research Pens: not verified. Pure Peptide Labs: yes. Lot-specific certificates — American Research Pens: not verified; Pure Peptide Labs: yes.
Which is cheaper?
We could not compare a like-for-like listing; price tiers are premium (American Research Pens) and unknown (Pure Peptide Labs).