Activates delta-opioid receptors to produce mood-lifting and anxiety-reducing effects without the addictive properties tied to mu-opioid pathways. May also enhance brain plasticity through BDNF signaling.
For research purposes only. These suppliers have been independently verified by PepSpace. We do not process sales directly.
Notable side effects likely; manageable with proper awareness
Data note: Acts on TREK-1 potassium channels (opioid-adjacent pathways). Preclinical only — virtually no human safety data exists.
Always consult a qualified healthcare professional before use. This information is for research reference only and does not constitute medical advice.
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Peptide vial, BAC water, alcohol swabs, insulin syringe
Wipe tops of both vials with alcohol swabs
Pull 1–2 mL of BAC water into syringe
Release water slowly along vial wall, not directly on powder
Roll between palms until dissolved. Never shake.
Refrigerate 2–8°C, use within 30 days
Yes. Bacteriostatic water (BAC water) is required to reconstitute lyophilized (freeze-dried) peptides. It contains 0.9% benzyl alcohol which prevents bacterial growth, keeping your reconstituted peptide safe for multiple uses over up to 30 days.
Unreconstituted: store at -20°C (freezer) for long-term, or 2–8°C (fridge) for short-term. After reconstitution: always refrigerate at 2–8°C and use within 30 days. Keep away from direct sunlight.
Results vary by individual and protocol. In research settings, measurable effects are typically observed within 1–4 weeks depending on the specific peptide, dosage, and application. Consult a qualified professional for guidance.
Verified suppliers typically include a full third-party COA verifying purity (99%+), identity, and sterility. We recommend only sourcing from vendors that provide batch-specific testing data.
We list verified suppliers above that have been independently reviewed for product quality, testing transparency, and shipping reliability. Always verify COA data before sourcing.
Scientific data & classification for PE-22-28
Published findings on PE-22-28 from peer-reviewed journals.
Always source from verified suppliers. Look for vendors that provide batch-specific COAs, use temperature-controlled shipping, and maintain transparent testing protocols.
Reputable suppliers typically offer free or low-cost shipping with cold-chain packaging to preserve compound integrity during transit.
PepSpace independently reviews suppliers listed on our platform based on testing standards, shipping practices, and community feedback.
We verify every data point. All compound information on PepSpace is cross-referenced against published research, verified supplier data, and community feedback.
If you spot an error or have updated information, reach out to our team and we will review and correct it promptly.
Our goal is to be the most accurate peptide reference available, updated continuously.
Know your local regulations. Peptide research compounds may be subject to different regulations depending on your country and intended use.
PepSpace provides information for educational and research purposes only. Always verify the legal status of any compound in your jurisdiction before sourcing.
Verified suppliers listed on our platform typically handle customs documentation for international research orders.
COAs are the gold standard. A Certificate of Analysis from an independent third-party laboratory verifies purity, identity, sterility, and potency.
Always request batch-specific COAs (not generic ones) when sourcing any research compound. Purity should be 99%+ for research-grade peptides.
Verified suppliers on PepSpace are required to provide batch-specific testing data for every compound they offer.