Ascension Peptides vs S1Research
Two top US peptide sources scored on the identical published formula: lab credibility, shipping, pricing, operating history, and transparency.
- Ascension Peptides
- 7.55/10
Ascension Peptides
- S1Research
- 7.75/10
S1Research
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Factor by factor
- 9.1Lab Credibilityweight 55%8.7
- 6.0Shipping & Refundweight 20%6.0
- 6.6Pricingweight 15%9.5
- 4.1Operating Historyweight 5%1.8
- 3.0Transparencyweight 5%5.0
- 29Certificates confirmed at the lab29
- 2Labs named on certificates2
Show as a table
| Category | Ascension Peptides | S1Research |
|---|---|---|
| Lab Credibility | 9.1 | 8.7 |
| Shipping & Refund | 6.0 | 6.0 |
| Pricing | 6.6 | 9.5 |
| Operating History | 4.1 | 1.8 |
| Transparency | 3.0 | 5.0 |
| Overall | 7.55 | 7.75 |
Products both carry, price for price
| Peptide | Ascension Peptidesper unit | S1Researchper unit |
|---|---|---|
| BPC-157Guide → | $4.90/mg | $2.00/mg |
| TB-500Guide → | $10.80/mg | $3.60/mg |
| GHK-CuGuide → | $0.59/mg | $0.31/mg |
| IpamorelinGuide → | $10.00/mg | $2.60/mg |
| Semax | $5.00/mg | $3.50/mg |
| Selank | $5.00/mg | $3.50/mg |
| Sermorelin | $7.20/mg | $3.70/mg |
| Tesamorelin | $10.00/mg | $2.35/mg |
| NAD+ | $0.10/mg | $0.06/mg |
| MOTS-c | $6.20/mg | $1.30/mg |
| PT-141 | $4.90/mg | $2.00/mg |
| AOD-9604 | $11.00/mg | — |
| 5-Amino-1MQ | $5.20/mg | $0.94/mg |
| Thymosin Alpha-1 | $7.10/mg | $3.85/mg |
| DSIP | $6.00/mg | $2.20/mg |
| SS-31 | $8.00/mg | $1.66/mg |
| GLOW | $1.57/mg | $0.60/mg |
| KLOW | $1.50/mg | $0.62/mg |
| CJC-1295 + Ipamorelin | $7.00/mg | $2.70/mg |
| BPC-157 + TB-500 | $4.50/mg | $2.50/mg |
How they compare: the verdict
S1Research takes this matchup by a razor-thin margin, 7.75 to 7.55 on the published formula. Its biggest edge is pricing, where it scores 9.5 against Ascension Peptides's 6.6.
It isn't a clean sweep. Ascension Peptides actually edges ahead on operating history (4.1 vs 1.8), so if that factor matters most to you it's worth weighing.
On lab evidence, the heaviest-weighted factor, both Ascension Peptides and S1Research have independently verified third-party COAs, so the gap comes down to the other categories.
Across the 19 peptides both carry, S1Research is cheaper per unit more often (Ascension Peptides wins on 0, S1Research on 19). 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.
Ascension Peptides vs S1Research: FAQ
Ascension Peptides or S1Research: which is better?
S1Research takes this matchup by a razor-thin margin, 7.75 to 7.55 on the published formula. Its biggest edge is pricing, where it scores 9.5 against Ascension Peptides's 6.6. It isn't a clean sweep. Ascension Peptides actually edges ahead on operating history (4.1 vs 1.8), so if that factor matters most to you it's worth weighing. On lab evidence, the heaviest-weighted factor, both Ascension Peptides and S1Research have independently verified third-party COAs, so the gap comes down to the other categories. Across the 19 peptides both carry, S1Research is cheaper per unit more often (Ascension Peptides wins on 0, S1Research on 19). The price-for-price table below has the detail, per mg (or per IU or mL for products sold that way).
Do Ascension Peptides and S1Research both use third-party testing?
Ascension Peptides: independently verified third-party COAs. S1Research: 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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