Published lab records · Calculated grades. Labelled affiliate placements.

Vendor status

Closed peptide vendors

Closed peptide vendors and shops that went offline: 11 lab-tested shops whose website no longer works, or whose store we found not operating when we reviewed it.

  • Each status comes from our own checks: a check of every shop's website on Oct 14, 2026, or our review of the shop.
  • “No working storefront” is not the same as closed. Some shops sell through messaging apps, and 3 of these had a sample tested in the last 60 days.
  • Each row names a shop whose samples of the same peptide graded A or B.

Peptide Sciences shut down: what happened

Peptide Sciences says it voluntarily discontinued all research-use-only product sales in March 2026, and that it has not authorized any third party, replacement website or successor to sell on its behalf. (Notice on peptidesciences.com, checked Oct 27, 2026.) Sites using a similar name are not the original store.

Its 126 lab tests stay on record. Peptide Sciences reviews and lab results · Peptide Sciences alternatives for Retatrutide: Peptide Partners (grade A)

Every closed or offline peptide vendor

Shop reopened, or wrongly listed here? Send the working URL through the contact page and it will be rechecked. Before ordering from any shop, run the vendor checklist.

Important information

Peptide Vendor Reviews is a free research tool, not a medical service. Nothing here is medical advice or intended to diagnose, treat, cure, or prevent disease. Consult a licensed physician for personal medical advice. Publication does not imply FDA or other regulatory approval.

We aggregate third-party lab reports but do not guarantee their authenticity or accuracy. Results describe specific samples—not every batch or product you may receive.

Our grades reflect the available reports, not an endorsement of any vendor or product or a guarantee of safety.

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Closed Peptide Vendors: Shops That Shut Down (Incl. Peptide Sciences)