S1Research vs Verified Peptides
Two top US peptide sources scored on the identical published formula: lab credibility, shipping, pricing, operating history, and transparency.
- S1Research
- 7.70/10
S1Research
- Verified Peptides
- 7.67/10
Verified Peptides
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Factor by factor
- 8.6Lab Credibilityweight 55%8.2
- 6.0Shipping & Refundweight 20%7.5
- 9.5Pricingweight 15%7.9
- 1.8Operating Historyweight 5%7.0
- 5.0Transparencyweight 5%2.5
- 29Certificates confirmed at the lab11
- 2Labs named on certificates1
Show as a table
| Category | S1Research | Verified Peptides |
|---|---|---|
| Lab Credibility | 8.6 | 8.2 |
| Shipping & Refund | 6.0 | 7.5 |
| Pricing | 9.5 | 7.9 |
| Operating History | 1.8 | 7.0 |
| Transparency | 5.0 | 2.5 |
| Overall | 7.70 | 7.67 |
Products both carry, price for price
| Peptide | S1Researchper unit | Verified Peptidesper unit |
|---|---|---|
| 5-Amino-1MQ | $0.94/mg | $1.70/mg |
| AOD-9604 | — | $9.80/mg |
| BPC-157Guide → | $2.00/mg | $5.30/mg |
| GHK-CuGuide → | $0.31/mg | $0.50/mg |
| IGF-1 LR3 | — | $65.00/mg |
| IpamorelinGuide → | $2.60/mg | $4.50/mg |
| PT-141 | $2.00/mg | $3.50/mg |
| TB-500Guide → | $3.60/mg | $6.20/mg |
| Tesamorelin | $2.35/mg | $5.95/mg |
How they compare: the verdict
S1Research takes this matchup by a razor-thin margin, 7.70 to 7.67 on the published formula. Its biggest edge is transparency, where it scores 5.0 against Verified Peptides's 2.5.
It isn't a clean sweep. Verified Peptides actually edges ahead on operating history (7.0 vs 1.8), so if that factor matters most to you it's worth weighing.
On lab evidence, the heaviest-weighted factor, both S1Research and Verified Peptides have independently verified third-party COAs, so the gap comes down to the other categories.
Across the 7 peptides both carry, S1Research is cheaper per unit more often (S1Research wins on 7, Verified Peptides on 0). The price-for-price table below has the detail, per mg (or per IU or mL for products sold that way).
S1Research vs Verified Peptides: FAQ
S1Research or Verified Peptides: which is better?
S1Research takes this matchup by a razor-thin margin, 7.70 to 7.67 on the published formula. Its biggest edge is transparency, where it scores 5.0 against Verified Peptides's 2.5. It isn't a clean sweep. Verified Peptides actually edges ahead on operating history (7.0 vs 1.8), so if that factor matters most to you it's worth weighing. On lab evidence, the heaviest-weighted factor, both S1Research and Verified Peptides have independently verified third-party COAs, so the gap comes down to the other categories. Across the 7 peptides both carry, S1Research is cheaper per unit more often (S1Research wins on 7, Verified Peptides 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 Verified Peptides both use third-party testing?
S1Research: independently verified third-party COAs. Verified Peptides: 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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