S1Research vs Simple Peptide
Two top US peptide sources scored on the identical published formula: lab credibility, shipping, pricing, operating history, and transparency.
- S1Research
- 7.97/10
S1Research
- Simple Peptide
- 8.32/10
Simple Peptide
Affiliate links: we may earn a commission if you buy. It never changes a score or rank.
Factor by factor
- 9.1Lab Credibilityweight 55%8.6
- 6.0Shipping & Refundweight 20%8.5
- 9.5Pricingweight 15%7.5
- 1.8Operating Historyweight 5%7.2
- 5.0Transparencyweight 5%8.0
- 28Certificates confirmed at the lab44
- 2Labs named on certificates1
Show as a table
| Category | S1Research | Simple Peptide |
|---|---|---|
| Lab Credibility | 9.1 | 8.6 |
| Shipping & Refund | 6.0 | 8.5 |
| Pricing | 9.5 | 7.5 |
| Operating History | 1.8 | 7.2 |
| Transparency | 5.0 | 8.0 |
| Overall | 7.97 | 8.32 |
Products both carry, price for price
| Peptide | S1Researchper unit | Simple Peptideper unit |
|---|---|---|
| 5-Amino-1MQ | $0.94/mg | $1.50/mg |
| BPC-157Guide → | $2.00/mg | $4.25/mg |
| Cagrilintide | $4.40/mg | $14.00/mg |
| CJC-1295 + Ipamorelin | $2.70/mg | $6.50/mg |
| DSIP | $2.20/mg | $7.00/mg |
| Epitalon | $2.50/mg | $3.30/mg |
| GHK-CuGuide → | $0.31/mg | $0.55/mg |
| GLOW | $0.60/mg | $1.64/mg |
| Glutathione | $0.02/mg | $0.05/mg |
| IpamorelinGuide → | $2.60/mg | $6.50/mg |
| KLOW | $0.62/mg | $1.75/mg |
| KPV | $3.00/mg | $4.50/mg |
| MOTS-c | $1.30/mg | $2.85/mg |
| NAD+ | $0.06/mg | $0.10/mg |
| PT-141 | $2.00/mg | $4.50/mg |
| RetatrutideGuide → | $1.50/mg | $6.55/mg |
| Selank | $3.50/mg | $5.50/mg |
| SemaglutideGuide → | $1.50/mg | $6.51/mg |
| Semax | $3.50/mg | $5.50/mg |
| Sermorelin | $3.70/mg | $7.90/mg |
| TB-500Guide → | $3.60/mg | $6.50/mg |
| BPC-157 + TB-500 | $2.50/mg | $3.30/mg |
| Tesamorelin | $2.35/mg | $7.50/mg |
| Thymosin Alpha-1 | $3.85/mg | $8.60/mg |
| TirzepatideGuide → | $1.00/mg | $2.44/mg |
| Bacteriostatic Water | — | — |
How they compare: the verdict
Simple Peptide takes this matchup by a razor-thin margin, 8.32 to 7.97 on the published formula. Its biggest edge is operating history, where it scores 7.2 against S1Research's 1.8.
It isn't a clean sweep. S1Research actually edges ahead on pricing (9.5 vs 7.5), so if that factor matters most to you it's worth weighing.
On lab evidence, the heaviest-weighted factor, both S1Research and Simple Peptide have independently verified third-party COAs, so the gap comes down to the other categories.
Across the 25 peptides both carry, S1Research is cheaper per unit more often (S1Research wins on 25, Simple Peptide on 0). The price-for-price table below has the detail, per mg (or per IU or mL for products sold that way).
Affiliate links: we may earn a commission if you buy. It never changes a score or rank.
S1Research vs Simple Peptide: FAQ
S1Research or Simple Peptide: which is better?
Simple Peptide takes this matchup by a razor-thin margin, 8.32 to 7.97 on the published formula. Its biggest edge is operating history, where it scores 7.2 against S1Research's 1.8. It isn't a clean sweep. S1Research actually edges ahead on pricing (9.5 vs 7.5), so if that factor matters most to you it's worth weighing. On lab evidence, the heaviest-weighted factor, both S1Research and Simple Peptide have independently verified third-party COAs, so the gap comes down to the other categories. Across the 25 peptides both carry, S1Research is cheaper per unit more often (S1Research wins on 25, Simple Peptide on 0). The price-for-price table below has the detail, per mg (or per IU or mL for products sold that way).
Do S1Research and Simple Peptide both use third-party testing?
S1Research: 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.
More comparisons
Other head-to-heads featuring S1Research or Simple Peptide.