Modern Aminos vs Peptix USA
Two top US peptide sources scored on the identical published formula: lab credibility, shipping, pricing, operating history, and transparency.
- Modern Aminos
- 7.88/10
Modern Aminos
- Peptix USA
- 8.15/10
Peptix USA
Affiliate links: we may earn a commission if you buy. It never changes a score or rank.
Factor by factor
- 8.7Lab Credibilityweight 55%8.7
- 7.0Shipping & Refundweight 20%9.0
- 7.8Pricingweight 15%8.8
- 4.9Operating Historyweight 5%1.3
- 5.5Transparencyweight 5%3.5
- 32Certificates confirmed at the lab5
- 3Labs named on certificates2
Show as a table
| Category | Modern Aminos | Peptix USA |
|---|---|---|
| Lab Credibility | 8.7 | 8.7 |
| Shipping & Refund | 7.0 | 9.0 |
| Pricing | 7.8 | 8.8 |
| Operating History | 4.9 | 1.3 |
| Transparency | 5.5 | 3.5 |
| Overall | 7.88 | 8.15 |
Products both carry, price for price
| Peptide | Modern Aminosper unit | Peptix USAper unit |
|---|---|---|
| BPC-157Guide → | $5.40/mg | $4.00/mg |
| Tesamorelin | $7.10/mg | $6.20/mg |
How they compare: the verdict
Peptix USA takes this matchup by a razor-thin margin, 8.15 to 7.88 on the published formula. Its biggest edge is shipping & refunds, where it scores 9.0 against Modern Aminos's 7.0.
It isn't a clean sweep. Modern Aminos actually edges ahead on operating history (4.9 vs 1.3), so if that factor matters most to you it's worth weighing.
On lab evidence, the heaviest-weighted factor, both Modern Aminos and Peptix USA have independently verified third-party COAs, so the gap comes down to the other categories.
Across the 2 peptides both carry, Peptix USA is cheaper per unit more often (Modern Aminos wins on 0, Peptix USA on 2). 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.
Modern Aminos vs Peptix USA: FAQ
Modern Aminos or Peptix USA: which is better?
Peptix USA takes this matchup by a razor-thin margin, 8.15 to 7.88 on the published formula. Its biggest edge is shipping & refunds, where it scores 9.0 against Modern Aminos's 7.0. It isn't a clean sweep. Modern Aminos actually edges ahead on operating history (4.9 vs 1.3), so if that factor matters most to you it's worth weighing. On lab evidence, the heaviest-weighted factor, both Modern Aminos and Peptix USA have independently verified third-party COAs, so the gap comes down to the other categories. Across the 2 peptides both carry, Peptix USA is cheaper per unit more often (Modern Aminos wins on 0, Peptix USA on 2). The price-for-price table below has the detail, per mg (or per IU or mL for products sold that way).
Do Modern Aminos and Peptix USA both use third-party testing?
Modern Aminos: independently verified third-party COAs. Peptix USA: 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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