Core Peptides vs Koi Peptides
Core Peptides scores higher, 74 to 72. The widest gap is catalog. Same formula, same data fields, October 2026.
Factor by factor
| Factor | Core Peptides | Koi Peptides | Edge |
|---|---|---|---|
| Testing & certificates | 84 | 82 | Core Peptides |
| Documentation depth | 40 | 65 | Koi Peptides |
| Transparency | 100 | 86 | Core Peptides |
| Track record | 44 | 40 | Core Peptides |
| Catalog | 87 | 48 | Core Peptides |
| Pricing | 64 | 65 | Koi Peptides |
| Ordering & service | 65 | 90 | Koi Peptides |
Fact sheets side by side
| Core Peptides | Koi Peptides | |
|---|---|---|
| Overall score | 74/100 (#4) | 72/100 (#7) |
| Status | Operating | Operating |
| Based in | Orlando, FL | Sheridan, WY (registered address); warehouses Austin, TX and Long Beach, CA |
| Founded | 2019 | 2022 |
| Third-party testing | Yes | Yes |
| Laboratories named | Vanguard Laboratory | Freedom Diagnostics |
| Public certificates | Yes | Yes |
| Lot-specific certificates | Yes | Yes |
| Formats | vials, blends, topical | vials |
| Catalog size | ≈104 | — |
| BPC-157 5 mg listed price | $52 | — |
| Free shipping from | $200 | $200 |
| Payments | card | card, ach, wire |
| Ships internationally | No | Yes |
| Research-use disclaimer | Yes | Yes |
| FDA warning letter | None found | None found |
Read the full reviews: Core Peptides review · Koi Peptides review. Both suppliers sell materials labeled for laboratory research use only.
Both appear on: US-based suppliers · Suppliers with public certificates of analysis · Lot-level third-party testing · Suppliers that take card payments.
The factor that separates them
The widest gap is catalog (87 vs 48). How every factor is computed is on the methodology page.
Related comparisons
Core Peptides vs Pure Peptide Labs · BioLongevity Labs vs Koi Peptides · Koi Peptides vs Peptide Perfection
Frequently asked questions
Which is better, Core Peptides or Koi Peptides?
On our formula Core Peptides scores higher (74 vs 72). The largest gap is in catalog (87 vs 48). "Better" depends on what you weight; both fact sheets are on this page.
Do both publish certificates of analysis?
Core Peptides: yes. Koi Peptides: yes. Lot-specific certificates — Core Peptides: yes; Koi Peptides: yes.
Which is cheaper?
We could not compare a like-for-like listing; price tiers are mid (Core Peptides) and mid (Koi Peptides).