Simple Peptide vs Transition Biotech
Two top US peptide sources scored on the identical published formula: lab credibility, shipping, pricing, operating history, and transparency.
- Simple Peptide
- 8.32/10
Simple Peptide
- Transition Biotech
- 7.98/10
Transition Biotech
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Factor by factor
- 8.6Lab Credibilityweight 55%9.2
- 8.5Shipping & Refundweight 20%6.0
- 7.5Pricingweight 15%9.5
- 7.2Operating Historyweight 5%1.8
- 8.0Transparencyweight 5%4.0
- 44Certificates confirmed at the lab10
- 1Labs named on certificates1
Show as a table
| Category | Simple Peptide | Transition Biotech |
|---|---|---|
| Lab Credibility | 8.6 | 9.2 |
| Shipping & Refund | 8.5 | 6.0 |
| Pricing | 7.5 | 9.5 |
| Operating History | 7.2 | 1.8 |
| Transparency | 8.0 | 4.0 |
| Overall | 8.32 | 7.98 |
Products both carry, price for price
| Peptide | Simple Peptideper unit | Transition Biotechper unit |
|---|---|---|
| RetatrutideGuide → | $6.55/mg | $3.50/mg |
| TirzepatideGuide → | $2.44/mg | $1.33/mg |
| BPC-157Guide → | $4.25/mg | $3.50/mg |
| BPC-157 + TB-500 | $3.30/mg | $2.75/mg |
| TB-500Guide → | $6.50/mg | $4.50/mg |
| GHK-CuGuide → | $0.55/mg | $0.30/mg |
| IpamorelinGuide → | $6.50/mg | $3.50/mg |
| CJC-1295Guide → | $7.00/mg | $4.50/mg |
| NAD+ | $0.10/mg | $0.07/mg |
| Kisspeptin-10 | $4.50/mg | $4.00/mg |
How they compare: the verdict
Simple Peptide takes this matchup by a razor-thin margin, 8.32 to 7.98 on the published formula. Its biggest edge is operating history, where it scores 7.2 against Transition Biotech's 1.8.
It isn't a clean sweep. Transition Biotech 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 Simple Peptide and Transition Biotech have independently verified third-party COAs, so the gap comes down to the other categories.
Across the 10 peptides both carry, Transition Biotech is cheaper per unit more often (Simple Peptide wins on 0, Transition Biotech on 10). The price-for-price table below has the detail, per mg (or per IU or mL for products sold that way).
Simple Peptide vs Transition Biotech: FAQ
Simple Peptide or Transition Biotech: which is better?
Simple Peptide takes this matchup by a razor-thin margin, 8.32 to 7.98 on the published formula. Its biggest edge is operating history, where it scores 7.2 against Transition Biotech's 1.8. It isn't a clean sweep. Transition Biotech 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 Simple Peptide and Transition Biotech have independently verified third-party COAs, so the gap comes down to the other categories. Across the 10 peptides both carry, Transition Biotech is cheaper per unit more often (Simple Peptide wins on 0, Transition Biotech on 10). The price-for-price table below has the detail, per mg (or per IU or mL for products sold that way).
Do Simple Peptide and Transition Biotech both use third-party testing?
Simple Peptide: independently verified third-party COAs. Transition Biotech: 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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