Short answer: you cannot tell a fake or underdosed peptide by looking at the powder. Almost every white lyophilized peptide looks the same. What you can check is the paperwork and the seller: a batch-specific certificate of analysis from a named third-party lab, with HPLC purity and mass spectrometry identity that match the product. A 2026 analysis of consumer “research grade” peptides found wide variation in purity and actual content, so this is not a theoretical concern. Here are the eight checks that catch most problems.
The 8 checks
- A COA exists and is batch-specific. The lot number on the COA matches the lot number on your vial. A single generic COA for “all BPC-157” is not enough.
- The testing lab is named. “Third-party tested” without a lab name cannot be verified.
- There is mass spectrometry, not just HPLC. HPLC tells you how pure the main peak is; MS confirms that peak is the right molecule. Without MS, a pure sample of the wrong peptide can pass.
- The molecular weight matches. Compare the observed mass with the expected one (for example, about 1,419 Da for BPC-157).
- Quantity is reported. Purity is a percentage; content is milligrams. A 99% pure vial containing 6 mg instead of 10 mg is still a short vial.
- The COA date is recent and consistent. Dates in the future, years-old reports, or identical chromatograms across different products are warning signs.
- The seller is identifiable. A real address, a way to reach a person, and a stated replacement or refund policy.
- The price is plausible. Prices far below every other vendor usually mean less peptide, lower purity, or both.
Red flags on a COA
| Red flag | Why it matters |
|---|---|
| No lab name, logo or contact | Cannot be verified; may be self-made |
| Purity of exactly 99.99% everywhere | Real results vary between batches |
| Same chromatogram image on several products | Copied document |
| No mass spectrum | Identity not confirmed |
| Lot number missing or unrelated to your vial | The COA may not describe what you received |
Our full walkthrough, line by line, is in how to read a peptide COA.
What the vial can tell you
Not much, but a few things are useful. The powder should be a dry cake or powder, not wet or collapsed. Blue colour is normal for GHK-Cu (why GHK-Cu is blue) but not for most other peptides. Once reconstituted, a solution should be clear; cloudiness or particles mean something is wrong. None of this confirms identity or dose.
Independent testing
If you need certainty, independent labs will test a sample you send them for purity, identity and content. Results take days to weeks and cost money per sample, but it is the only way to know what is in a specific vial. Some vendors also let you look up results by lot number.
Our approach: TrueLabs publishes batch COAs in our COA library. Hold us to the same eight checks you would apply to anyone else.
Frequently asked questions
Cliquez sur une question pour afficher la réponse.
How can you tell if a peptide is fake?
Not by appearance. Check for a batch-specific COA from a named lab that includes HPLC purity, mass spectrometry identity, a matching molecular weight and the actual quantity, with a lot number that matches your vial.
What is the difference between purity and content?
Purity is the percentage of the material that is the target peptide; content is how many milligrams are actually in the vial. A vial can be highly pure but contain less than the label says.
Why does mass spectrometry matter?
HPLC shows how pure the main component is, but mass spectrometry confirms that the component is the correct molecule by measuring its mass.
Can I test a peptide myself?
Not at home. Independent analytical labs can test a sample for purity, identity and content for a fee.
Are cheap peptides fake?
Not always, but prices far below the market usually mean less peptide, lower purity or both.
Related reading
- What research peptides cost in Canada
- How to read a peptide COA
- Canadian vs imported peptides
- Buying research peptides in Canada
References
- Mendias CL, Awan TM. Evaluation of research grade peptides marketed directly to consumers reveals extensive variability in purity and measured abundance. Preprints.org. April 2026 (not peer-reviewed). Preprint
- Health Canada. Think twice before injecting peptides bought online. April 9, 2026. Health Canada
All TrueLabs products are sold for in vitro and laboratory research use only. They are not intended for human or veterinary use.