Understand the source comparison
Peptide Comparison: Evidence, Mechanism, and Realistic Outcomes
Not all peptides marketed for sleep have equivalent evidence. Some target symptom suppression. Others address root mechanisms. This table compares the peptides with documented relevance to shift work sleep disorder. Epithalamin (Epitalon) Pineal melatonin synt
No winner is assigned.
This page preserves a source comparison for education. It does not add a rating, recommendation or clinical judgment.
- Not all peptides marketed for sleep have equivalent evidence. Some target symptom suppression. Others address root mechanisms. This table compares the peptides with documented relevance to shift work sleep disorder.
- Epithalamin (Epitalon)
- Pineal melatonin synthesis restoration
- Controlled trials show 35–42% increase in nocturnal melatonin
- 10mg subcutaneous, 10-day cycles every 3–6 months
- Gradual improvement in sleep onset latency over 4–8 weeks; effect persists post-cycle
- Best for workers with documented melatonin suppression on lab testing. Not a fast-acting sleep aid
- DSIP (Delta Sleep-Inducing Peptide)
- Slow-wave sleep architecture enhancement
- Neuropsychobiology trial: 28% increase in delta-wave percentage
- 100–500mcg intranasal or subcutaneous before sleep window
- Improved restorative sleep quality without sedation; no tolerance buildup documented
- Strong option for workers who fall asleep but wake unrefreshed. Targets sleep depth, not onset
- Selank
- HPA axis modulation, cortisol reduction
- Russian Academy research: 22–30% cortisol reduction in stress insomnia
- 250–500mcg intranasal, 1–2× daily
- Reduced physiological arousal after night shifts; easier sleep onset in high-stress roles
- Most effective when combined with structured wind-down protocol post-shift
- Cerebrolysin
- Neuroplasticity and neuroprotection
- Limited direct sleep trials; cognitive resilience documented
- 5–10ml IV, clinical setting only
- Indirect benefit through cognitive recovery from chronic sleep deprivation
- Not a sleep peptide. But relevant for workers managing cumulative cognitive deficits from years of shift work
- Melatonin (for comparison)
- Exogenous circadian signal
- Extensive evidence but effect size modest (15–20 min sleep onset improvement)
- 0.5–5mg oral, 1–2 hours before sleep window
- Temporary phase shift; suppresses endogenous production long-term
- First-line intervention but insufficient as monotherapy for severe circadian misalignment