By the Banger Labs Research Team · Updated June 2026
What happened to Peptide Sciences
For years one of the largest US research-peptide suppliers (reportedly ~$7.4M/month in sales), Peptide Sciences voluntarily ceased operations on March 6, 2026 without prior warning, pulling its entire catalog offline and leaving pending orders unfulfilled. Its exit is part of a broader 2026 contraction in the grey market that also took down Amino Asylum (FDA-raided, June 2025) and Science.bio (closed January 2026).
How to vet a replacement vendor in 2026
The 2026 enforcement wave (the FDA issued 50+ warning letters to peptide sellers in 2024–2025) means picking a replacement on price alone is risky. Use the buyer’s de-facto legitimacy checklist:
- Independent, batch-specific COAs — a Certificate of Analysis from a recognized third-party lab (e.g., Janoshik, with HPLC purity + mass-spec identity), matched to the exact lot — not a generic, reused document. This is the #1 trust signal.
- ≥ 99% HPLC purity — the industry benchmark for “excellent” (≥ 96% is the floor).
- A real physical address and card payments — crypto/Zelle-only is a red flag.
- US-based fulfillment — fewer customs seizures, faster delivery.
- Clear research-use-only framing — legitimate vendors never make human-use or medical claims.
Peptide Sciences vs. a 2026 replacement
Why researchers are moving to Banger Labs
Banger Labs is a US-based research-peptide supplier built around the things the closed vendors got wrong: verifiable quality and transparency. Every compound is held to a ≥ 99% HPLC purity standard, ships with a Certificate of Analysis available per batch, and is labeled strictly for research use only. Orders are fulfilled in the USA with fast, discreet shipping, and checkout accepts standard cards (plus Pay-in-4 at checkout).
Popular replacements for displaced buyers:
- BPC-157 — the repair-research staple
- GLP-3 RETA & GLP-1 SM — the incretin-class research peptides
- Tesamorelin & Ipamorelin — growth-axis research
- GLOW — the GHK-Cu + BPC-157 + TB-500 blend
Browse the full Banger Labs catalog →
Frequently asked questions
Is Peptide Sciences coming back?
There has been no announced reopening; the catalog remains offline and orders went unfulfilled after the March 2026 shutdown. Treat it as closed.
What is the best Peptide Sciences alternative?
Look for a US-based vendor with independent, batch-specific COAs at ≥ 99% HPLC purity, card payment, and clear research-use-only labeling. Banger Labs is built around exactly those criteria.
How do I know a replacement is legit?
Verify a third-party Certificate of Analysis (ideally Janoshik-verifiable), a real physical address, card payment, and RUO labeling. Avoid crypto-only sellers and generic/reused COAs.
By the Banger Labs Research Team. For research use only. Not for human or veterinary use. Not a drug, food, or cosmetic. Information here is educational and is not medical advice; “research use only” labeling does not authorize human consumption.