Understand the source comparison
Cagrilintide Authentication: Comparison of Verification Methods
Third-party COA review Purity %, molecular weight, impurity profile None. Document review only Immediate upon receipt Free (included with purchase) Essential first step. Eliminates 60% of counterfeits through documentation alone. COA must be from ISO 17025 acc
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This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.
- Third-party COA review
- Purity %, molecular weight, impurity profile
- None. Document review only
- Immediate upon receipt
- Free (included with purchase)
- Essential first step. Eliminates 60% of counterfeits through documentation alone. COA must be from ISO 17025 accredited lab, not supplier's internal testing.
- Visual inspection of powder
- Color, texture, clumping, moisture damage
- None
- 2–3 minutes
- Free
- Catches gross contamination or improper storage but misses molecular-level fraud. White/off-white uniform powder is necessary but not sufficient for authenticity.
- Reconstitution clarity test
- Solubility, particulate matter, precipitation
- Bacteriostatic water, sterile vial
- 5 minutes
- $8–$12 for bacteriostatic water
- Reveals synthesis quality and contamination. Authentic cagrilintide dissolves to crystal clarity in 60–90 seconds at room temperature. Cloudiness or particles indicate impurity or degradation.
- pH verification post-reconstitution
- Buffer formulation accuracy, contamination
- pH test strips
- 1 minute after reconstitution
- $6–$10 for 100-strip pack
- Quick secondary check. Authentic cagrilintide solution reads pH 6.5–7.5. Readings outside this range suggest manufacturing error or bacterial contamination.
- Independent mass spectrometry
- Exact molecular weight, sequence confirmation
- MS access via contract lab or university core facility
- 3–7 days
- $150–$300 per sample
- Definitive molecular-level proof. Authentic cagrilintide shows 3,882.4 Da ± 0.5 Da. Any deviation confirms counterfeit or degraded product. Worth the cost for high-value purchases.
- Independent HPLC analysis
- Purity percentage, impurity identification
- HPLC access via contract lab
- $120–$250 per sample
- Gold standard for purity confirmation. Authentic batches show ≥98% purity with single dominant peak. Multiple peaks or purity <97% indicates synthesis failure or intentional dilution.