Testing Lab Directory
Third-party testing is essential for verifying peptide quality. Learn how to read Certificates of Analysis (COAs) and find reputable testing laboratories.
Reputable Testing Laboratories
Independent analytical laboratory providing testing services for supplements, pharmaceuticals, and research compounds. ISO 17025 accredited.
Services
7-14 business days
$75-250 per sample
ISO 17025 accredited. Good balance of cost and comprehensiveness. Strong in supplement testing.
Visit WebsiteEuropean analytical laboratory specializing in substance identification and purity testing. Popular in European peptide communities.
Services
7-14 business days
€50-150 per sample
Good European alternative to Janoshik. Anonymous submission available. Detailed reporting.
Visit WebsiteFDA-registered laboratory providing analytical testing for pharmaceuticals, research chemicals, and dietary supplements.
Services
5-15 business days
$100-300 per sample
FDA-registered facility. More comprehensive testing options. Professional pharmaceutical-grade reports.
Visit WebsiteHarm reduction organization offering anonymous drug checking services. Non-profit focused on harm reduction rather than profit.
Services
14-21 business days
€50-100 per sample (donation-based)
Harm reduction focus. Non-profit organization. Completely anonymous. Results contribute to public health data.
Visit WebsiteOne of the world's largest testing laboratory networks with locations globally. Offers comprehensive pharmaceutical testing services.
Services
14-28 business days
$300-1500+ per sample
Global pharmaceutical standard. Internationally recognized. Best for regulatory or legal documentation needs.
Visit WebsiteThe most widely used third-party testing service in the peptide and research chemical community. Known for reliability, affordability, and public result verification.
Services
7-14 business days
$50-150 per sample
Industry standard for gray market testing. Public database allows verification of results. Bitcoin accepted for anonymity.
Visit WebsiteMajor pharmaceutical testing company offering analytical services. Primarily serves pharmaceutical companies and clinical trials.
Services
10-21 business days
$500-2000+ per sample
Pharmaceutical industry standard. Extremely comprehensive but expensive. Best for legal/regulatory purposes.
Visit WebsiteUS-based analytical testing laboratory offering peptide analysis services. Good option for those who prefer domestic shipping and faster turnaround times.
Services
5-10 business days
$75-200 per sample
US-based for easier domestic shipping. Professional reports. Growing reputation in the community.
Visit WebsiteHow to Read a Certificate of Analysis (COA)
HPLC Purity
High-Performance Liquid Chromatography separates and quantifies compounds in a sample. The purity percentage tells you how much of the sample is your desired peptide vs impurities. This is the most important single metric for peptide quality.
≥98% for research grade, ≥99% for pharmaceutical grade
<95% purity, or purity not provided, or only 'pass/fail' without percentage
Look at the chromatogram if provided. A clean sample shows one dominant peak with minimal smaller peaks. Multiple large peaks suggest significant impurities or degradation.
Mass Spectrometry (MS)
Confirms the molecular identity by measuring the exact molecular weight. Each peptide has a unique molecular weight based on its amino acid sequence. MS verification proves you have the correct compound, not a substitute or degraded product.
Measured mass within 0.1% of theoretical molecular weight
Mass doesn't match expected weight, significant deviation (>1%), or MS not performed
For example, BPC-157 has a molecular weight of 1419.53 Da. The MS result should show a peak at or very near this value. A significantly different mass means wrong compound.
Amino Acid Analysis (AAA)
Breaks down the peptide and measures the individual amino acids present. Verifies the peptide contains the correct amino acids in the right ratios. More detailed than MS alone.
All expected amino acids present in correct ratios (within 10%)
Missing amino acids, wrong ratios, or unexpected amino acids present
This test is especially important for longer peptides where MS alone may not catch all issues. It's more expensive but provides additional confidence.
Endotoxin Testing (LAL)
Limulus Amebocyte Lysate test detects bacterial endotoxins - toxic components from gram-negative bacteria that can cause fever, inflammation, and septic shock when injected. Critical for any injectable product.
<0.25 EU/mg (Endotoxin Units per milligram) or <5 EU/mL when reconstituted
Not tested, >1 EU/mg, or only 'pass' without quantitative result
Even visually sterile products can contain dangerous endotoxin levels. This test is often skipped by vendors but is essential for injectable safety.
Sterility Testing
Tests for the presence of viable microorganisms (bacteria, fungi, yeast). The sample is cultured in growth media and monitored for any microbial growth over 7-14 days.
No growth detected after 14-day incubation
Not tested, growth detected, or shortened incubation period
Note that sterility testing only tells you about the sample tested. Contamination can occur during reconstitution if proper aseptic technique isn't used.
Heavy Metals Testing
Tests for toxic metals including lead, mercury, arsenic, and cadmium. These can accumulate in the body with repeated exposure and cause serious health issues. Particularly important for products from unregulated manufacturing.
All metals below detection limits or <0.5 ppm for each
Any metal >1 ppm, arsenic or mercury detected at any level, or not tested
USP (pharmaceutical) limits: Lead <0.5 ppm, Mercury <0.3 ppm, Arsenic <0.15 ppm, Cadmium <0.25 ppm. Products should meet or exceed these standards.
Residual Solvents
Tests for solvents used during peptide synthesis that may remain in the final product. Common solvents include TFA (trifluoroacetic acid), acetonitrile, and DMF. High levels can be toxic.
All solvents within ICH Q3C limits (varies by solvent)
TFA >1000 ppm, acetonitrile >410 ppm, or testing not performed
TFA is commonly used in peptide synthesis and is the most frequently detected residual solvent. It can cause irritation at high levels.
Moisture Content
Measures water content in lyophilized (freeze-dried) peptides. Excessive moisture accelerates degradation and indicates poor manufacturing or storage.
<5% moisture content
>10% moisture or visible clumping of powder
Properly lyophilized peptides should appear as a fluffy, dry powder. Wet or clumped powder suggests moisture exposure and potential degradation.
Appearance/Solubility
Visual inspection and solubility testing. Proper peptides should have expected color (usually white to off-white) and dissolve clearly in appropriate solvents.
White to off-white powder, dissolves clearly without particles
Yellow/brown discoloration, doesn't fully dissolve, or particles remain
Discoloration often indicates oxidation or degradation. Insoluble particles could indicate aggregation or contamination.
Peptide Content/Net Peptide
The actual amount of active peptide in the vial, accounting for moisture content, counter-ions (like acetate or TFA), and impurities. A '10mg' vial might only contain 7-8mg of actual peptide.
Net peptide content ≥70% of labeled weight
<60% net peptide content or not disclosed
This is different from purity. A 98% pure peptide might have 75% net peptide content due to moisture and counter-ions. Both metrics matter for accurate dosing.
How to Test Your Peptides: Step-by-Step
Choose Your Lab
Select a testing laboratory based on your needs. Consider location (domestic vs international), cost, turnaround time, and whether you need anonymous submission. For most people, Janoshik offers the best balance of cost and comprehensiveness.
Select Tests
At minimum, request HPLC purity and Mass Spectrometry for identity confirmation. For injectables, add endotoxin and sterility testing. Most labs offer package deals that are more cost-effective than individual tests.
Prepare Your Sample
You typically need 10-50mg of sample depending on tests requested. Keep the sample in its original container if possible. If transferring, use a clean, dry container. Label clearly with a sample ID you create (not your name).
Submit and Pay
Create an account on the lab's website, select your tests, and pay. Most labs accept cryptocurrency for anonymity. You'll receive shipping instructions and a sample ID to track your results.
Ship Your Sample
Package securely to prevent damage during shipping. International shipping may require customs declarations - labs provide guidance on this. Use tracking and appropriate shipping speed for your timeline.
Receive Results
Results typically come via email with a detailed Certificate of Analysis. Some labs post results publicly with your sample ID for community verification. Review all results carefully against the guidelines above.
Interpret and Decide
Compare results to acceptable ranges. If results are good, you have verified product. If results show problems, do NOT use the product. Consider sharing results (anonymously) with the community to help others.
Recommended Tests by Peptide Type
Different peptides have different testing priorities. Use this guide to determine which tests are most important for your specific product.
GLP-1 Agonists
Semaglutide, Tirzepatide, Liraglutide
Essential Tests
Recommended
Identity confirmation via MS is critical - these are high-value peptides commonly counterfeited. Potency testing ensures correct dosing for these powerful medications.
Healing Peptides
BPC-157, TB-500, Thymosin Beta-4
Essential Tests
Recommended
BPC-157 has a unique molecular weight (1419.53 Da) that should be verified. TB-500/Thymosin Beta-4 is commonly underdosed due to high cost.
Growth Hormone Secretagogues
Ipamorelin, CJC-1295, Sermorelin, GHRP-6
Essential Tests
Recommended
These peptides are relatively affordable to synthesize so counterfeiting is less common, but purity can vary significantly between sources.
Melanocortin Peptides
Melanotan II, PT-141/Bremelanotide
Essential Tests
Recommended
These peptides are potent at low doses. Purity is important as impurities can cause significant side effects.
Cognitive Peptides
Semax, Selank, Dihexa
Essential Tests
Recommended
Semax and Selank are often used intranasally, which has different sterility requirements than injectables. Identity confirmation is important.
Red Flags in Vendor-Provided COAs
Many vendors provide Certificates of Analysis, but not all are legitimate. Watch for these warning signs that may indicate fabricated or misleading documentation.
No third-party lab name
Legitimate COAs identify the testing laboratory. 'In-house testing' or no lab name is meaningless.
Results from different batch/lot
COAs should match the batch number on your product. Testing one batch doesn't guarantee another batch's quality.
Only 'Pass/Fail' without numbers
Real testing provides quantitative results (e.g., '98.7% purity'), not just pass/fail.
Missing test date
COAs should be dated. Very old results may not reflect current product quality.
Suspiciously perfect results
Results like '100.0% purity' or perfectly round numbers may indicate fabrication. Real testing shows variation.
Generic/template appearance
Fabricated COAs often use generic templates. Real lab reports have unique formatting and lab letterhead.
No contact information
Legitimate labs include contact information. You should be able to verify results with the lab directly.
Missing chromatograms
HPLC results should include the actual chromatogram (graph), not just a number. This allows verification of the analysis.
Frequently Asked Questions
Safety First
Third-party testing is just one part of harm reduction. Make sure you understand all the risks before considering peptide use.