Independently tested. Verified at >99% purity. For laboratory research use only.
View CatalogCompounds studied in laboratory settings for metabolic signaling and related biochemical pathways
Compounds studied in laboratory settings for cellular and molecular research applications
Peptides studied in laboratory settings for growth hormone signaling and related biochemical pathways
Compounds studied in laboratory settings for mitochondrial function and cellular energy pathways
Compounds studied in laboratory settings for neurotransmitter activity and neuroregulatory signaling
Reconstitution
Sterile bacteriostatic water with 0.9% benzyl alcohol for peptide reconstitution. Required for preparing lyophilized research compounds for in vitro use.
We run every batch through HPLC and mass spectrometry, then send samples to an independent third-party lab. You receive the Certificate of Analysis with every order.
View Testing & PurityQuality Assurance
Every batch is sent to Janoshik Analytics, an independent third-party laboratory, for verification. Results below are from official test reports. Full reports can be verified directly at janoshik.com using the task number listed.
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Our Mission
PepLabUSA was founded on a simple premise — researchers deserve to know exactly what is in the compounds they are working with. The research chemical industry has long been plagued by inconsistent quality, opaque sourcing, and a lack of independent verification. We set out to change that.
Every compound we supply is independently tested by a third-party laboratory before it reaches our catalog. We publish the results openly, with verifiable links to the original lab reports. No internal-only testing. No unverifiable claims. Just transparent, reproducible data.
Our mission is to be the most trustworthy source of research-grade peptides and biochemical compounds in the United States — not just in terms of purity, but in terms of honesty about where our products come from, how they are tested, and what the results show.
For questions, contact us at peplabusanet@gmail.com
Behind the Science
High-Performance Liquid Chromatography separates the components of a compound sample and measures the relative proportion of each. This gives us the chromatographic purity percentage — the gold standard for verifying a peptide's purity profile.
Mass spectrometry confirms the molecular identity of a compound by measuring the mass-to-charge ratio of its ions. This verifies that the compound is exactly what it claims to be — not a substitute, contaminant, or mislabeled product.
Lyophilization — or freeze-drying — removes moisture from peptides under vacuum while keeping their molecular structure intact. This extends stability and shelf life significantly compared to liquid formulations, making it the preferred format for research compounds.
Unlike internal testing performed by the supplier themselves, third-party verification is conducted by an independent laboratory with no financial stake in the results. All PepLabUSA COAs are issued by independent labs including Janoshik Analytics and Krause Analytical.
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