Supplier research article

How to Read a Peptide COA — The Real Peptides Promise

Real Peptides vs. a typical research peptide brand Most research peptide brands say the same three words: third-party tested. The difference shows up in what they actually publish. Below is an honest, side-by-side look at how the Real Peptides Promise compares

By Peptide Suppliers & Lab Reviews Editorial TeamPublished January 27, 2026

Real Peptides vs. a typical research peptide brand

Most research peptide brands say the same three words: third-party tested. The difference shows up in what they actually publish. Below is an honest, side-by-side look at how the Real Peptides Promise compares to the testing a typical research-only (RUO) brand provides. We're not naming anyone — the point isn't to call another company "bad," it's to give you a checklist for judging research peptide quality for yourself.

// "Typical RUO brand" reflects common practices across the research peptide market and is not a claim about any specific company. Compare any brand using the six-point checklist above.

CONNECTED INTELLIGENCE

Source trace appendix

Topic-linked material for additional review. Association does not constitute supplier verification.

EXECUTIVE NOTES

A COA is a batch-specific lab report, not a marketing sheet. It records measured results for one specific production run (its purity, identity, and impurities) and should never read like a generic template reused across products. 🧪
Verify identity with mass spectrometry, not just a name. MS confirms the peptide’s actual molecular weight matches the expected value, proving the compound is what the label claims. ⚖️
Purity should be ≥98% by HPLC and the method must be shown. A bare “98%” with no chromatogram, column, or gradient details is essentially unverifiable and should lower your confidence. 📊
The batch/lot number on the COA must match the vial. Traceability is the whole point; a mismatched or missing lot number breaks the chain between the document and your actual product. 🔖
Recency and an identifiable lab matter. A credible COA is dated (ideally within ~6 months of purchase) and names the laboratory that performed the analysis, so results can be independently checked. 📅

TRACE / muscleandbrawn.com ↗

Research & source excerpts

RESEARCH

What purity level should a research peptide COA show?

For research grade peptide quality, 98% purity by HPLC is the accepted minimum. Results at or above 99% are considered stronger documentation and are appropriate for more sensitive analytical applications. Purity below 98% is not automatically disqualifying but represents a higher proportion of uncharacterized material in the sample.

Real Peptides vs. a typical research peptide brand

How To Read A Peptide COA | Muscle And Brawn

How to Read a Peptide COA

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