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Source comparison

Sermorelin Compounding: Quality Comparison

Purity Verification HPLC + mass spec on every batch; CoA provided Rarely tested; no CoA or vague 'research grade' claim Compounded sermorelin is the only option when reproducibility matters. Bulk peptides introduce uncontrolled variables Amino Acid Sequence Ac

This comparison does not assign a generated winner or score.

  • Purity Verification
  • HPLC + mass spec on every batch; CoA provided
  • Rarely tested; no CoA or vague 'research grade' claim
  • Compounded sermorelin is the only option when reproducibility matters. Bulk peptides introduce uncontrolled variables
  • Amino Acid Sequence Accuracy
  • Verified via Edman degradation or LC-MS/MS
  • Not verified; truncated or scrambled sequences common
  • Sequence errors render peptides biologically inactive. This alone justifies compounding costs
  • Endotoxin Testing
  • LAL assay confirms <1 EU/mg
  • Not tested; endotoxin contamination frequent
  • Endotoxins trigger immune activation that confounds experimental results. Especially in in vivo models
  • Sterility Assurance
  • USP <71> sterility testing per batch
  • Not tested; contamination risk high
  • Multi-dose vials without sterility testing are unusable after 72 hours
  • Lyophilisation Protocol
  • Optimised freeze-drying with mannitol or trehalose
  • No lyoprotectant or inconsistent process
  • Improper lyophilisation causes aggregation and potency loss within weeks
  • Reconstitution Guidance
  • Bacteriostatic water provided; protocol documented
  • No guidance; users often reconstitute incorrectly
  • Incorrect reconstitution accounts for 40% of 'peptide doesn't work' complaints