Understand the source comparison
KLOW Real vs Fake: Peptide Authentication Comparison
Certificate of Analysis Batch-specific CoA with HPLC chromatogram showing ≥98% purity, matching lot number on vial, includes mass spec confirmation Generic CoA applied to all batches, missing chromatogram, unnaturally perfect 100% purity claim, lot number mism
No winner is assigned.
This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.
- Certificate of Analysis
- Batch-specific CoA with HPLC chromatogram showing ≥98% purity, matching lot number on vial, includes mass spec confirmation
- Generic CoA applied to all batches, missing chromatogram, unnaturally perfect 100% purity claim, lot number mismatch
- Cross-reference vial lot code with CoA batch number; verify HPLC graph shows single dominant peak
- Certificate authenticity is the single most important verification. Without batch-specific HPLC data, you cannot confirm peptide identity or purity
- Reconstitution Behavior
- Dissolves completely in bacteriostatic water within 60 seconds, forms optically clear colorless solution, maintains clarity for 28 days at 2–8°C
- Incomplete dissolution with visible particulates, cloudy solution, precipitate formation within 72 hours of reconstitution
- Add 2mL bacteriostatic water, observe dissolution time and solution clarity; store reconstituted peptide and check for precipitates daily
- Reconstitution clarity is the definitive physical test. Aggregation or cloudiness indicates degraded or contaminated product
- Supplier Registration
- FDA 503B facility registration (verifiable at accessdata.fda.gov), established business entity with years of operating history, transparent contact information
- No regulatory registration, recently created domain (<6 months), generic overseas address, email-only contact
- Search FDA 503B database for facility name; check domain registration age via WHOIS lookup; verify business entity through state corporate registry
- Regulatory oversight ensures sterile production standards. Unregistered suppliers operate without quality control enforcement
- Batch Traceability
- Publicly accessible batch verification system, unique lot codes for every production run, synthesis date and expiration clearly labeled
- Reused lot codes across shipments, no batch lookup system, missing or illegible expiration dates
- Enter lot code into supplier's batch verification portal; confirm synthesis date and expiration match vial label
- Batch traceability proves the specific vial you received underwent the claimed testing. Without it, the CoA could reference any batch
- Technical Support Quality
- Responds within 24–48 hours with peptide-specific guidance, staff can discuss synthesis methods and analytical procedures, provides reconstitution protocols
- No response, generic copy-pasted answers, inability to answer technical questions about synthesis or quality control
- Contact with specific technical question before ordering; evaluate response depth and accuracy
- Support quality reflects company expertise. Legitimate suppliers employ staff with peptide biochemistry knowledge
- Price Positioning
- Priced within 15–25% of established market rates for research-grade peptides, transparent pricing with no hidden fees
- Dramatically below market (>40% cheaper), prices that seem 'too good to be true', inconsistent pricing across batches
- Compare quoted price to three other verified suppliers; confirm final price matches initial quote at checkout
- Extreme discounting indicates either diluted product or counterfeit operations. Peptide synthesis has minimum viable cost floors