Amino Club vs S1Research
Two top US peptide sources scored on the identical published formula: lab credibility, shipping, pricing, operating history, and transparency.
- Amino Club
- 8.08/10
Amino Club
- S1Research
- 7.70/10
S1Research
Affiliate links: we may earn a commission if you buy. It never changes a score or rank.
Factor by factor
- 9.3Lab Credibilityweight 55%8.6
- 6.5Shipping & Refundweight 20%6.0
- 8.5Pricingweight 15%9.5
- 1.7Operating Historyweight 5%1.8
- 6.0Transparencyweight 5%5.0
- 38Certificates confirmed at the lab29
- 1Labs named on certificates2
Show as a table
| Category | Amino Club | S1Research |
|---|---|---|
| Lab Credibility | 9.3 | 8.6 |
| Shipping & Refund | 6.5 | 6.0 |
| Pricing | 8.5 | 9.5 |
| Operating History | 1.7 | 1.8 |
| Transparency | 6.0 | 5.0 |
| Overall | 8.08 | 7.70 |
Products both carry, price for price
| Peptide | Amino Clubper unit | S1Researchper unit |
|---|---|---|
| RetatrutideGuide → | $6.67/mg | $1.50/mg |
| BPC-157Guide → | $4.00/mg | $2.00/mg |
| GHK-CuGuide → | $0.58/mg | $0.31/mg |
| Tesamorelin | $7.00/mg | $2.35/mg |
| TB-500Guide → | $4.00/mg | $3.60/mg |
| NAD+ | $0.14/mg | $0.06/mg |
| AOD-9604 | $10.00/mg | — |
| MOTS-c | $3.37/mg | $1.30/mg |
| CJC-1295 + Ipamorelin | $6.00/mg | $2.70/mg |
| BPC-157 + TB-500 | $7.50/mg | $2.50/mg |
| GLOW | $1.29/mg | $0.60/mg |
| DSIP | $6.00/mg | $2.20/mg |
| Semax | $3.00/mg | $3.50/mg |
| Selank | $3.00/mg | $3.50/mg |
| KLOW | $1.25/mg | $0.62/mg |
| KPV | $4.00/mg | $3.00/mg |
| PT-141 | $3.00/mg | $2.00/mg |
| Glutathione | $0.04/mg | $0.02/mg |
| IpamorelinGuide → | $5.00/mg | $2.60/mg |
| IGF-1 LR3 | $69.99/mg | — |
| Bacteriostatic Water | $1.00/mL | — |
| Cagrilintide | $7.00/mg | $4.40/mg |
| Epitalon | $3.00/mg | $2.50/mg |
| 5-Amino-1MQ | $1.00/mg | $0.94/mg |
| Thymosin Alpha-1 | $4.00/mg | $3.85/mg |
| SNAP-8 | $3.00/mg | $0.49/mg |
| Sermorelin | $6.00/mg | $3.70/mg |
| TirzepatideGuide → | $1.83/mg | $1.00/mg |
| SemaglutideGuide → | $5.00/mg | $1.50/mg |
| AHK-Cu | $0.60/mg | $0.04/mg |
How they compare: the verdict
Amino Club takes this matchup by a razor-thin margin, 8.08 to 7.70 on the published formula. Its biggest edge is transparency, where it scores 6.0 against S1Research's 5.0.
It isn't a clean sweep. S1Research actually edges ahead on pricing (9.5 vs 8.5), so if that factor matters most to you it's worth weighing.
On lab evidence, the heaviest-weighted factor, both Amino Club and S1Research have independently verified third-party COAs, so the gap comes down to the other categories.
Across the 27 peptides both carry, S1Research is cheaper per unit more often (Amino Club wins on 2, S1Research on 25). 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.
Amino Club vs S1Research: FAQ
Amino Club or S1Research: which is better?
Amino Club takes this matchup by a razor-thin margin, 8.08 to 7.70 on the published formula. Its biggest edge is transparency, where it scores 6.0 against S1Research's 5.0. It isn't a clean sweep. S1Research actually edges ahead on pricing (9.5 vs 8.5), so if that factor matters most to you it's worth weighing. On lab evidence, the heaviest-weighted factor, both Amino Club and S1Research have independently verified third-party COAs, so the gap comes down to the other categories. Across the 27 peptides both carry, S1Research is cheaper per unit more often (Amino Club wins on 2, S1Research on 25). The price-for-price table below has the detail, per mg (or per IU or mL for products sold that way).
Do Amino Club and S1Research both use third-party testing?
Amino Club: 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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