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Is Core Peptides legit?
Core Peptides is operating and surfaces credible public signals (composite 53/100), but we have not placed a first-hand test order yet — this is a public-data audit. 156 Vanguard records from three lab orders, a KPV lot at 59.35% purity, an IGF-1 LR3 vial at 42% of label, and 42 shop PDFs missing quantity. 53/100. The signal table below shows what we verified and what is still open.
Signal table
What works, what does not
- +156 lab records you can open on Vanguard Laboratory's public portal without a login
- +Median purity 99.25% across the 156 records; 127 read 99% or higher
- +81 of 104 product pages link a certificate with a lot number you can match to your vial
- +No FDA warning letter found, and no GLP-1 product in the October 2026 catalog
- +Same-day dispatch before 4 pm ET and refunds requestable up to 30 days after ordering
- −Lab copies show a KPV lot at 59.35% purity and an IGF-1 LR3 vial holding 0.42 mg of a 1 mg label
- −The 42 shop PDFs that match a lab copy with a quantity line all leave that line out
- −The shop's Fragment 176-191 certificate carries the lab ID of an AOD-9604 report
- −Identity checked on 45 of 156 records, by HPLC match only; no mass spectrometry
- −Calls its lab "A2LA-accredited"; the A2LA scope lists no peptide test
- −No legal entity named in the terms or privacy policy
What we mean by "legit"
We do not use "legit" as a single yes-or-no signal. A vendor is legit when four things hold: identifiable corporate operator, third-party or independently-mirrored COAs, shipping and payment infrastructure that consistently delivers, and a complaint history that surfaces real issues rather than vanishes them. Our composite score is the weighted average of those four — shipping, pricing, support, COA quality — and you can read the full rubric at /methodology.
For Core Peptides the audit is "public-data tier" — we aggregate vendor disclosures, third-party COA mirrors, operating-history evidence, and complaint patterns. A first-hand test order is still pending and the page will be upgraded when that lands.
Verdict
156 Vanguard records from three lab orders, a KPV lot at 59.35% purity, an IGF-1 LR3 vial at 42% of label, and 42 shop PDFs missing quantity. 53/100.
Other audited vendors
Sources
- Vanguard Laboratory public portal, brand 'Core Peptides' (156 records) — third-party-lab
- vialaudit data: all 156 Core Peptides records at Vanguard, with lot codes and shop-copy comparison (CSV) — vialaudit
- A2LA scope of accreditation, Olympic Analytical LLC dba Vanguard Laboratory, certificate 6377.01 — A2LA
- Peptide Decode, Core Peptides review (3 October 2026) — Peptide Decode
- Disclosed Labs, Vanguard Laboratory lab page — Disclosed Labs
- Core Peptides about page — vendor
- Core Peptides shipping, returns and refunds — vendor