Procurement comparison
Biotech Peptides Legit Review 2026: Quality Marker Comparison
HPLC Purity ≥98% with chromatogram Claims ≥95% (no chromatogram provided publicly) ≥98% with full chromatogram in CoA Without chromatogram access, claimed purity cannot be independently verified. Standard research protocol requires visual peak inspection Mass
Review the documented criteria directly; this page does not generate a winner or rating.
- HPLC Purity
- ≥98% with chromatogram
- Claims ≥95% (no chromatogram provided publicly)
- ≥98% with full chromatogram in CoA
- Without chromatogram access, claimed purity cannot be independently verified. Standard research protocol requires visual peak inspection
- Mass Spectrometry
- Required with ±0.5 Da accuracy
- Not consistently provided in customer reports
- ESI-MS or MALDI-TOF on every batch
- Absence of mass spec data means molecular identity remains unconfirmed. Synthesis errors go undetected
- Third-Party CoA
- ISO 17025 accredited lab
- Generic CoA format (laboratory accreditation unclear)
- Named accredited labs with letterhead
- Generic CoA without laboratory name or accreditation number carries no independent verification weight
- Endotoxin Testing
- <1 EU/mg via LAL assay
- Not specified in available documentation
- <1 EU/mg confirmed per batch
- Endotoxin absence cannot be assumed. Without LAL testing, peptides may trigger immune responses in cellular or animal models
- Amino Acid Analysis
- Confirms sequence accuracy
- Not provided
- AAA confirms residue composition
- Amino acid analysis detects deletion sequences or substitution errors HPLC alone cannot catch
- Synthesis Method
- SPPS with coupling verification
- SPPS claimed (coupling verification not documented)
- SPPS with Kaiser test at each step
- Coupling verification prevents deletion sequences. Absence of documentation raises quality uncertainty