Comparison
PE 22-28 vs Selank
PE 22-28: Fast, potent drive restoration. Selank: Clean, sustainable anxiolytic.
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PE 22-28
TREK-1 Potassium Channel Blocker
Nootropict½ Short plasma t½; functional CNS effect >24h
Selank
Anxiolytic Peptide
Nootropict½ 8–15 minutes (plasma); behavioral effects persist 4–8 hours
Effectiveness Profile
PE 22-28
Selank
At a Glance
| PE 22-28 | Selank | |
|---|---|---|
| Type | Nootropic | Nootropic |
| Legal status | Research | Research |
| Half-life | Short plasma t½; functional CNS effect >24h | 8–15 minutes (plasma); behavioral effects persist 4–8 hours |
| Preferred route | SubQ | Intranasal |
| Dose frequency | once-daily | twice-daily |
| Beginner dose | 125–250 mcg | 250–500 mcg |
| Intermediate dose | 250–400 mcg | 600–900 mcg |
| Advanced dose | 400–600 mcg | 1000–2250 mcg |
| Cycle length | 2–6 wks | 2–6 wks |
| Time to peak | — | 0.15h |
| Active duration | 24h | 6h |
| Storage | Lyophilized: frozen, stable >12 months. Reconstituted: 2–8°C, use within ~30 days | Lyophilized: -20°C long-term, 2–8°C short-term. Reconstituted: 2–8°C, use within 4–6 weeks. |
| PCT required | No | No |
| Ancillaries required | No | No |
| Safe for women | Yes | Yes |
Verdict
PE 22-28 wins for:
- Rapid antidepressant onset (mood elevation in days, not weeks)
- Potency on motivation, drive, and post-crash anhedonia
- Short, punchy cycles with minimal sedation or cognitive dulling
Selank wins for:
- Reliable, smooth anxiolysis without dependence or withdrawal
- Broader safety profile for long-term or daily protocols
- Sourcing consistency and broader research literature
- Versatility as a base in cognitive and stress-management stacks
Pick A or B?
Pick PE 22-28 if:
- The primary goal is fast reversal of anhedonia, PCT crash, or cycle-induced mood drop
- Motivation and drive need a short-term boost during harsh cutting phases
- A research subject is stacking with Semax/Cerebrolysin for intense nootropic or mood effects
- The protocol requires minimal sedative or tranquilizing effects
- Rapid neurogenic action (BDNF, hippocampal support) is prioritized
Pick Selank if:
- Anxiety, stress, or irritability are the main issues (esp. on cycle or high-stress cuts)
- Daily or long-term mood and stress stability are the primary targets
- The research model is sensitive to sedation, withdrawal, or drug-dependence risks
- Blunted mood, low-grade stress, or poor sleep respond poorly to traditional anxiolytics
- Stacking for broad cognitive and emotional support over weeks/months
Where to Buy

Real Peptides
Our pickShips from USLogin RequiredPeptide specialistVials, capsules & sprays
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20% off — auto-applied at checkout
- Buy PE 22-28 · 20% offPE 22-28· PE-22-28 (8mg)
A 4-week protocol at 325 mcg/day ≈ 2 vials
- Buy Selank · 20% offSelank· Selank Amidate
A 4-week protocol at 750 mcg twice daily ≈ 5 vials
- Buy Selank · 20% offSelank· Selank Liquid Spray — 45mg

Swiss Chems
Ships from USWidest catalogCapsules, powders & injectables
Affiliate link — we may earn a commission at no cost to you.
10% off — auto-applied at checkout
- Buy Selank · 10% offSelank· Selank 5mg - SwissChems-Buy Best Quality Peptides, SARMS Online
A 4-week protocol at 750 mcg twice daily ≈ 9 vials
This comparison is presented for informational and educational purposes only. The compounds described may be research chemicals, prescription-only, or regulated substances in your jurisdiction. Consult a qualified medical professional before using any compound. This is not medical advice.