DSIP (Delta Sleep-Inducing Peptide)
A nonapeptide discovered in 1977 that modulates sleep architecture by promoting delta wave (deep sleep) patterns and normalizing circadian disruptions.
How it works
Modulates GABAergic and glutamatergic neurotransmission in sleep nuclei. Enhances delta wave NREM sleep, normalizes circadian patterns, and reduces cortisol/CRH during sleep.
Key facts
- Molecular weight: 849 Da
- Half-life: 7-8 minutes
- Bioavailability: Low (rapid peptidase degradation)
- Storage: Lyophilized: -20°C. Reconstituted: 2-8°C for 14 days.
Dosing overview
- Typical dose: 100-300 mcg
- Frequency: Once, ~30-60 min before bed
- Duration: 2-4 week courses
- Route: Subcutaneous injection
Protocol notes
- Single 100-300 mcg dose 30-60 minutes before intended sleep.
- Used in short 2-4 week blocks to reset sleep rather than as a nightly long-term aid.
Reported benefits
- Promotes delta (deep) sleep
- Normalizes sleep architecture
- Reduces stress hormones during sleep
- Non-addictive
- Improved nocturnal GH release
- Circadian normalization
Possible side effects
- Morning grogginess (dose-dependent)
- Headache (rare)
- Vivid dreams
- Injection site irritation
Research
- DSIP effects on sleep architecture in insomnia (2019): Increased delta sleep from 15% to 28% and reduced sleep onset latency by 50%.
- DSIP and neuroendocrine modulation (2020): Normalized nocturnal cortisol and increased GH pulse amplitude by 40% via enhanced slow-wave sleep.
Community reviews of DSIP
- evidence_eli rated it 5/5 - Genuinely effective after 2 months: Been using DSIP for about 2 months and the results are clear. Not overnight dramatic, but a steady, consistent improvement that became undeniable by the end of the first month. The mechanism makes sense based on what I have read in the literature, and my subjective experience matches the expected timeline. Benefits built gradually and plateaued at a good level. Side effects were minimal to none at the dose I used. Followed proper protocols for sourcing, storage, and administration. Would recommend to others who have done their research and have realistic expectations.
- research_marcus rated it 5/5 - Worth adding to the protocol: DSIP has been a worthwhile addition. I am data-driven and tracked relevant markers before, during, and after. The improvement is measurable and correlates with the intervention timeline. What sets this apart from some compounds I have tried is the consistency. Benefits did not fluctuate wildly or disappear. They built up and maintained. That gives me confidence in the mechanism. Tolerance has been excellent. Nothing in my bloodwork or subjective experience raised any flags. This is the kind of compound that does its job quietly without causing problems. Exactly what you want.
- fasted_frank rated it 5/5 - Noticed clear benefits within weeks: Added DSIP to my protocol about 4 months ago and it has earned its place. The benefits became noticeable around week 2-3 and have been consistent since. What I appreciate about this compound is the predictability. It does what the research suggests it should do, at roughly the timeline you would expect. No surprises, no dramatic swings, just steady improvement. No notable side effects to report at my dose. Sourcing is always the challenge with research compounds, insist on third-party testing. Storage and reconstitution per standard protocols. Plan to continue.
- dose_diary_alex rated it 5/5 - Solid compound with real results: Been using DSIP for about 3 months and the results are clear. Not overnight dramatic, but a steady, consistent improvement that became undeniable by the end of the first month. The mechanism makes sense based on what I have read in the literature, and my subjective experience matches the expected timeline. Benefits built gradually and plateaued at a good level. Side effects were minimal to none at the dose I used. Followed proper protocols for sourcing, storage, and administration. Would recommend to others who have done their research and have realistic expectations.
- jared_j rated it 4/5 - DSIP helped my sleep, but I still liked magnesium more: I tried DSIP for about 3 weeks during a busy stretch of freelance writing and evening training here in Brazil, when my sleep felt light and broken. For me it did make the nights feel a bit deeper, and I woke up less “wired,” fwiw. But I still preferred magnesium glycinate for the same goal, because it felt more consistent and simpler. DSIP was good, just not my first pick.
- swims_runner rated it 4/5 - DSIP helped me feel less fried after late training: I ran DSIP for about 3 months while juggling early client sessions, my own powerlifting work, and way too many nights where I was still wired after 9 pm. For me, it seemed to fit best on heavy training weeks, because I’d wake up feeling a little less beat up and my sleep felt deeper on a few nights, especially when I’d been buried all day in the South heat and just plain worn out. It wasn’t some dramatic knockout thing, and a couple nights I noticed basically nothing. Still, I kept it in my rotation because it seemed to help my recovery rhythm without making me feel groggy the next morning.
Compare DSIP
Community discussions about DSIP
Research and educational reference only. Not medical advice.