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VendorCOA

Peptide Sciences review: closed

Peptide Sciences (peptidesciences.com), long described as the largest US research-peptide vendor, stopped trading on March 6, 2026. Finnrick warns that purchases under the brand since then are fraudulent. Lookalike domains appeared within days of the closure.

peptidesciences.com

Our verdict on Peptide Sciences

Closed

Not ranked

  • No public COAs we could confirm
  • No independent tests on file

Last verified How we score

What to know before buying

  • Lookalike domains

    Sites using the Peptide Sciences name after March 2026 are not the original company.

    Reported· Oct 21, 2026PeptideChecked

COA and testing record

Publishes COAs
Unknown

Not checked.

Unverified· Oct 21, 2026
Lot-matched
Unknown

Not checked.

Unverified· Oct 21, 2026
Testing labs
None named

Not checked.

Unverified· Oct 21, 2026
Methods shown
None shown

Not checked.

Unverified· Oct 21, 2026
Independent tests
Historical Finnrick record only; no current product.
Verified· Oct 21, 2026Finnrick

Prices

Vials only. GLP-1 compounds not tracked.

Catalog, shipping and payment

Catalog access
closed
Verified· Oct 21, 2026Finnrick
Shipping
Not found. Unverified
Payment
Not found. Unverified
Returns
Not found. Unverified
Company
Not found. Unverified

Enforcement history

  • Stopped trading; the company called the closure voluntary. Finnrick warns further purchases under the brand are fraudulent.

    ReportedFinnrick, The Peptide List

Score breakdown

Method score

Not ranked

Closed

How scores work
COA transparency
0/40
Independent tests
0/25
Regulatory record
20/20
Policy clarity
0/15
Line-by-line breakdown
  • Publishes COAs publicly0/15No public COAs confirmed
  • COAs matched to lot numbers0/10Lot matching not confirmed
  • Names an independent lab0/10No independent lab named
  • Identity test (mass spec)0/5Only purity (HPLC) or nothing shown
  • Independent test pass rate0/25No public independent tests on file
  • Regulatory record20/202026-03-06: Stopped trading; the company called the closure voluntary. Finnrick warns further purchases under the brand are fraudulent.
  • Published shipping policy0/5Not found
  • Published returns policy0/5Not found
  • Identifiable company0/5Not identified

Top-scoring alternatives

  1. 1Core Peptides83
  2. 2True Peptides75
  3. 3Penguin Peptides74
  4. 4Ascension Peptides70
  5. 4Biotech Peptides70

Is Peptide Sciences legit? The short answer →

Questions

What is our Peptide Sciences review verdict?

Peptide Sciences is no longer operating; sites using the name since it closed are not the original company.

How is Peptide Sciences's score calculated?

Up to 40 points for COA transparency, 25 for independent lab results (only with at least five public tests), 20 for regulatory record and 15 for policy clarity. Only facts we verified in a primary source score, and payment can't change a score.

Where does Peptide Sciences ship and how do I pay?

Shipping terms not published. Payment: not published.

Does Peptide Sciences have a discount code?

We hold no verified percentage code for Peptide Sciences.