US supplier with batch-specific Janoshik COAs, HPLC chromatograms, and MS identity on published lab reports.
Core Peptides is a US-based research peptide supplier built around third-party verification. Batches are independently tested with Certificates of Analysis that include HPLC purity chromatograms and mass-spectrometry identity data, commonly verified through Janoshik Analytical. Reports are linked from product pages so you can review documentation before ordering.
Their catalog spans metabolic, repair, and signaling peptides used in biochemistry and pharmacology research, with research-use-only framing throughout.
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Sign inNot perfect but better than most. COA was batch specific, chromatogram included. Support answered a question about storage within a day. Minor packaging ding on the second order but peptide itself seemed fine in our QC checks.
Owen Lewis · 4 days ago
Lab manager here — we don't care about marketing copy, we care about traceability. They shipped with cold packs, batch ID matched, MS matched sequence on the two we tested. One star off bc website UX is clunky.
Matthew C. · about 2 months ago
Not perfect but better than most. COA was batch specific, chromatogram included. Support answered a question about storage within a day. Minor packaging ding on the second order but peptide itself seemed fine in our QC checks.
james_hplc · 9 months ago
HPLC numbers look reasonable when they post them, but the site makes you dig for older batches. Support was polite, not always fast. I'd reorder for non-critical assays only.
not_a_influencer · about 1 year ago
💬 Lot on the label wasn't in the COA portal yet after a week. When it appeared, the chromatogram looked like a template, not a full run. We paused that material for internal QC.
jessicacoa · about 1 year ago
Lot on the label wasn't in the COA portal yet after a week. When it appeared, the chromatogram looked like a template, not a full run. We paused that material for internal QC.
BatchKevin · about 1 year ago
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