Prime Peptides vs Simple Peptide
Two top US peptide sources scored on the identical published formula: lab credibility, shipping, pricing, operating history, and transparency.
- Prime Peptides
- 7.94/10
Prime Peptides
- Simple Peptide
- 8.32/10
Simple Peptide
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Factor by factor
- 8.6Lab Credibilityweight 55%8.6
- 9.0Shipping & Refundweight 20%8.5
- 6.3Pricingweight 15%7.5
- 3.8Operating Historyweight 5%7.2
- 5.5Transparencyweight 5%8.0
- 20Certificates confirmed at the lab44
- 5Labs named on certificates1
Show as a table
| Category | Prime Peptides | Simple Peptide |
|---|---|---|
| Lab Credibility | 8.6 | 8.6 |
| Shipping & Refund | 9.0 | 8.5 |
| Pricing | 6.3 | 7.5 |
| Operating History | 3.8 | 7.2 |
| Transparency | 5.5 | 8.0 |
| Overall | 7.94 | 8.32 |
Products both carry, price for price
| Peptide | Prime Peptidesper unit | Simple Peptideper unit |
|---|---|---|
| BPC-157Guide → | $5.50/mg | $4.25/mg |
| TB-500Guide → | $6.50/mg | $6.50/mg |
| GHK-CuGuide → | $0.60/mg | $0.55/mg |
| IpamorelinGuide → | $6.00/mg | $6.50/mg |
| Semax | $4.50/mg | $5.50/mg |
| Melanotan-2 | $4.00/mg | $3.80/mg |
| Sermorelin | $7.00/mg | $7.90/mg |
| Tesamorelin | $8.00/mg | $7.50/mg |
| RetatrutideGuide → | $5.42/mg | $6.55/mg |
| TirzepatideGuide → | $4.33/mg | $2.44/mg |
| SemaglutideGuide → | $7.50/mg | $6.51/mg |
| AOD-9604 | $12.00/mg | $8.00/mg |
| BPC-157 + TB-500 | $6.25/mg | $3.30/mg |
| Bacteriostatic Water | $2.50/mL | — |
| CJC-1295 + Ipamorelin | $8.00/mg | $6.50/mg |
| MOTS-c | $6.00/mg | $2.85/mg |
| Glutathione | $0.05/mg | $0.05/mg |
| NAD+ | $0.14/mg | $0.10/mg |
| KLOW | $1.81/mg | $1.75/mg |
| GLOW | $1.86/mg | $1.64/mg |
| Melanotan-1 | $4.50/mg | $4.50/mg |
How they compare: the verdict
Simple Peptide takes this matchup by a razor-thin margin, 8.32 to 7.94 on the published formula. Its biggest edge is operating history, where it scores 7.2 against Prime Peptides's 3.8.
It isn't a clean sweep. Prime Peptides actually edges ahead on shipping & refunds (9.0 vs 8.5), so if that factor matters most to you it's worth weighing.
On lab evidence, the heaviest-weighted factor, both Prime Peptides and Simple Peptide have independently verified third-party COAs, so the gap comes down to the other categories.
Across the 20 peptides both carry, Simple Peptide is cheaper per unit more often (Prime Peptides wins on 4, Simple Peptide on 14). The price-for-price table below has the detail, per mg (or per IU or mL for products sold that way).
Prime Peptides vs Simple Peptide: FAQ
Prime Peptides or Simple Peptide: which is better?
Simple Peptide takes this matchup by a razor-thin margin, 8.32 to 7.94 on the published formula. Its biggest edge is operating history, where it scores 7.2 against Prime Peptides's 3.8. It isn't a clean sweep. Prime Peptides actually edges ahead on shipping & refunds (9.0 vs 8.5), so if that factor matters most to you it's worth weighing. On lab evidence, the heaviest-weighted factor, both Prime Peptides and Simple Peptide have independently verified third-party COAs, so the gap comes down to the other categories. Across the 20 peptides both carry, Simple Peptide is cheaper per unit more often (Prime Peptides wins on 4, Simple Peptide on 14). The price-for-price table below has the detail, per mg (or per IU or mL for products sold that way).
Do Prime Peptides and Simple Peptide both use third-party testing?
Prime Peptides: independently verified third-party COAs. Simple Peptide: independently verified third-party COAs.
How was this comparison scored?
Both vendors are scored on the identical published formula: lab credibility 55%, shipping 20%, pricing 15%, operating history 5%, transparency 5%. When third-party testing cannot be independently verified, a testing gate holds the score under a cap that starts at 6.0 and rises by at most 2.5 points for operating history, shipping and reviews. Neither vendor can pay to change a score.
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