Source comparison
Real Peptides ARA-290 vs Competitors: Quality Comparison
Before selecting a supplier, researchers should compare synthesis method, third-party verification status, and post-reconstitution stability data. Not just price per milligram and advertised purity. Real Peptides Small-batch SPPS, triple coupling at difficult
This comparison does not assign a generated winner or score.
- Before selecting a supplier, researchers should compare synthesis method, third-party verification status, and post-reconstitution stability data. Not just price per milligram and advertised purity.
- Real Peptides
- Small-batch SPPS, triple coupling at difficult junctions
- Independent ISO 17025 lab (HPLC + MS)
- 99.2%+
- 99.3–99.6% (batch-verified)
- LAL assay, <1 EU/mg
- <1% (Karl Fischer verified)
- 96–98% purity retained
- Gold standard. Every batch externally verified with full analytical data published
- Competitor A
- Large-scale liquid-phase synthesis
- Supplier-issued COA only
- 98.5%
- 96.8–98.1% (independent testing showed variance)
- Not disclosed
- 3–5% (estimated)
- 89–92% purity retained
- Lower cost but inconsistent batch-to-batch purity; no external verification
- Competitor B
- SPPS with single-stage purification
- In-house HPLC only (no MS confirmation)
- 99%
- 97.4–99.2% (wide variance)
- LAL assay available on request
- 2% (not routinely disclosed)
- 93–95% purity retained
- Mid-tier quality; SPPS is a plus but lacks third-party MS confirmation
- Competitor C
- Contract synthesis (method not disclosed)
- Certificate of Analysis from contract lab
- 97–99% (range listed)
- Unknown (no independent data)
- Unknown
- Transparency gap. Method and verification unstated; acceptable for preliminary work only