Published
A peptide blend needs documentation that identifies the mixture’s components and the questions actually tested. One headline purity percentage does not automatically establish every ingredient, its quantity or the stated ratio. Read the laboratory’s method and reporting policy for mixtures.
This guide concerns analytical documentation. A composition table is not evidence of the clinical effects of a combination.
Why do some peptide blend COAs not show a purity percentage?
It can reflect the laboratory’s stated scope rather than an unexplained missing result. Janoshik’s blind peptide screening service covers identification and amount analysis of peptide blends and explicitly excludes purity for blends. That is this service’s published policy; it should not be rewritten as proof that every laboratory uses the same method or that mixtures are universally impossible to analyze. Janoshik: blind peptide screening and blend scope.
If a different report provides a blend purity value, ask what the laboratory means by it, which components and impurities the method can distinguish, and what the result represents. The presence of a percentage is not a substitute for those answers. Its absence is not automatically evidence that no testing occurred.
Does a 10 mg blend contain 10 mg of each peptide?
Not unless the specification actually states that. A total and a per-component amount are different claims. Check whether the listing describes the whole mixture, each ingredient or an entire multipack.
A fictional composition example
Mixture A lists 3 mg of Component X plus 7 mg of Component Y: 10 mg total. Mixture B lists 5 mg of X plus 5 mg of Y: also 10 mg total.
The totals match, but the ratios differ. Neither total means 10 mg of both components. These are invented numbers for reading practice, not formulas or assay results for store products.
Keep a separate row for each component. Record the labeled amount and any measured finding side by side, preserving their units and the method’s scope. A report identifying one ingredient does not automatically establish the other ingredients or their quantities.
| Field | Record | Do not substitute |
|---|---|---|
| Identity | The exact named component and the reported identity finding | The blend’s nickname |
| Quantity | Labeled amount and separately measured result, where available | Total blend mass assigned to every ingredient |
| Ratio | The stated or supported relationship among components | A ratio borrowed from another seller’s formulation |
| Other tests | The individual methods, findings and limits actually reported | A blanket statement that the mixture is fully tested |
Can I compare two GLOW or KLOW products by name alone?
Use the name to locate a listing, then compare the actual specification. A trade name does not itself define a universal composition or assay. Record the full material names, labeled quantities, pack size and available documentation for the exact offer.
Peptide Serum maintains separate GLOW and KLOW research profiles, with corresponding GLOW Blend and KLOW Blend catalog entries. Those links identify the site’s listings; they do not imply that a paper on one ingredient tested the supplied mixture.
How should I review a peptide blend COA?
- Copy the exact stated composition, including any unresolved amount or form.
- Identify the submitted sample, lot and report, and review their connection to the offered stock.
- Check whether every component of interest has a corresponding identity or amount finding.
- Read the issuer’s mixture-specific method and reporting scope before interpreting a purity value.
- Keep other tests and research outcomes separate from composition findings.
Do not average purity figures from separately tested single compounds and present the result as a measured purity for their mixture. That would create a new calculation with an unsupported reporting basis. If the supplied record does not resolve the blend question, ask the issuer or supplier which applicable document does.
Use the COA guide for document verification and the quantity reference for mixture arithmetic. Request available Peptide Serum records through Lab Testing.
Sources checked October 21, 2026. No universal blend assay, clinical effect or independent inventory verification is claimed.