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