Where to Buy PE-22-28: 2026 Vendor Status

If you're searching for where to buy PE-22-28, here's the honest status: it's on the market, but not yet in our vetted lineup. Several research-peptide vendors list it — in 5, 8, 10, and 20 mg vials — on the back of fast-rising interest in its TREK-1 research story. What doesn't exist yet is a listing from a vendor whose COA process we've verified.

This page tracks exactly that gap: current availability, how to get notified when a vetted source carries it, and what's comparable from verified vendors today.

Research-context information only. PE-22-28 is a research peptide. Protocols, doses, and reactions reported below come from published research and self-reported community sources. This article reports what has been documented, not what should be done. Consult a licensed physician for personal medical decisions.

Current Status: One Tracked Source, Rest Gray-Market

PE-22-28 is a 7-amino-acid spadin fragment targeting the TREK-1 potassium channel — the full research story is in our PE-22-28 benefits breakdown. Interest has climbed fast enough that it now appears across research-vendor catalogs and community calculator-usage trend charts.

What that means for sourcing right now:

• One tracked source. Limitless Life Nootropics lists 20 mg vials — surfaced through our niche-source allowance (they're not in the broadly recommended lineup, but they're the one affiliate source we track for this compound). Every other current listing is gray-market from vendors we haven't verified.
• The compound has no human data. Whatever vial arrives, every protocol figure attached to it is community convention for a mouse-stage compound — see the dosing guide for how thin that evidence base is.
• Verify before you order. A batch COA covering identity (mass spec) and purity (HPLC) is the minimum bar. No COA, no order.

Get Notified When a Recommended Partner Carries It

One tracked source is live today; our broadly recommended partners don't stock PE-22-28 yet. When one does — better pricing, verified COA process, the full lineup treatment — this alert is the fastest way to hear:

No spam — a single alert if and when the availability status genuinely changes.

What's Verifiable Today: The Nootropic Cluster

Nothing else on the market blocks TREK-1. But the research-nootropic peptides that community members run alongside or instead of PE-22-28 — semax and selank — are stocked by COA-verified vendors we track, with decades of documented research behind them that PE-22-28 simply doesn't have.

Affiliate disclosure: vendor links below are affiliate links — The Peptide Catalog may earn a commission if you buy through them, at no additional cost to you.

What to Watch Next

1. Vetted-vendor pickup. The most likely near-term change — our partner vendors' catalogs are watched daily, and PE-22-28's demand profile makes it a natural add.
2. Any human data. A single published pharmacokinetic or safety study would move every number in the community protocol from convention to evidence. None exists yet.
3. Price convergence. Gray-market listings currently spread wide per mg across the 5-20 mg sizes; a verified source entering usually compresses that quickly.