Sleep / Cognitive
DSIP
Delta Sleep Inducing Peptide
What it is
DSIP is a nine-amino-acid peptide first isolated in 1977 from rabbit blood. Named for its ability to promote delta-wave (deep) sleep. Decades of research have shown variable but real effects on sleep architecture, stress response, and mood.
How it works
Mechanism is not fully understood. Modulates the HPA axis (cortisol/stress response) and influences sleep architecture toward more delta-wave activity. Also has anti-stress effects independent of sleep.
Benefits
- Increased deep (delta-wave) sleep
- Reduced sleep latency
- Stress and cortisol reduction
- Improved sleep quality (subjectively)
- Possible mild analgesic effects
Timeline
- Night 1–3
- Sleep effects vary by user — some report immediate deeper sleep, others see no change.
- Week 1–2
- Cumulative effects on sleep architecture (when responsive).
Dosing & titration
Standard dose100–500 mcg subQ pre-bed
Cycle length2–4 weeks; not for daily long-term use
When to titrate upIf 100 mcg has no effect after a few nights, increase to 250 then 500 mcg. If still no effect, this peptide isn't for you.
Side effects & risks
- Generally well tolerated
- Inconsistent results across users
- Vivid dreams
- Rare: morning grogginess
Inconsistent reports. DSIP works dramatically for some users and not at all for others. Try a short cycle to test.
Typical price
$50–$100/mo5 mg vial from a 503A compounding pharmacy.
Studies
- Schneider-Helmert D, Schoenenberger GA. Effects of DSIP in man — Foundational human studies. PubMedNeuropsychobiology, 1983
- Search PubMed for DSIP — PubMed searchLive PubMed search
Educational reference only. Not medical advice.