Peptide profile · Sleep & Recovery
DSIP (Delta Sleep-Inducing Peptide)
A naturally occurring brain peptide that helps you fall into deep, restorative sleep by gently nudging your body's own sleep-wake systems—without the groggy hangover of traditional sleep aids.
Written by Michael Carroll — Owner, Director of Research · Reviewed by the Peptide Initiative Research Team
Typical dose
25 nmol/kg (about 1.5 mg for a 70 kg adult)
Half-life
7-8 minutes (but effects last many hours due to downstream signaling)
Bioavailability
Variable; best with subcutaneous or intravenous administration
Molecular weight
848.81 g/mol
Evidence level
Limited human trials
01 · Compound profile
Scientific & efficacy data
Molecular formula
C35H48N10O15
Primary benefits
Six small intravenous human trials, mixed results. Two from the discovering group found longer, less interrupted sleep and significantly better daytime alertness [1][4]. Two independent double-blind trials found the benefit small or not clinically significant [6][7].
Stress-hormone effects were reported in cells and in animals. The one human study to test it directly found DSIP does not affect ACTH or cortisol — the responses were almost identical to placebo after both a hormone challenge and a meal [8]. On this point the human evidence contradicts the animal finding.
Small numbers, all intravenous, none longer than seven consecutive nights [1]. The largest published human study enrolled 20 men [8]. Side effects reported were mild; the first study in healthy volunteers found none at all across symptom, physiological and blood measures [3]. Long-term use, and the subcutaneous and intranasal routes, are untested in people.
University of Basel, Switzerland
Amino acid sequence
Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu (WAGGDASGE)02 · Dosing
How much do I take?
25 nmol/kg (about 1.5 mg for a 70 kg adult) · single slow infusion
Covers all 5 dosing tiers · 3 administration routes · timing · dose-adjustment guidance.
03 · Suitability
Is this right for me?
Best for improving sleep quality and duration & resetting disrupted circadian rhythms
Best for
Chronic Insomnia
DSIP shines brightest for people who've struggled with sleep for months or years. Unlike sleeping pills that force you unconscious, DSIP helps restore your brain's natural ability to enter deep sleep. Human studies showed chronic insomniacs experienced longer sleep duration, fewer nighttime awakenings, and better overall sleep quality.
Jet Lag and Shift Work
When your internal clock is out of sync with the real world, DSIP can help reset it. The peptide influences circadian rhythm regulation, making it valuable for travelers crossing time zones or night-shift workers trying to sleep during the day. It helps your body understand when it's time to sleep.
Stress-Related Sleep Problems
Can't sleep because your mind won't stop racing? DSIP has documented stress-protective properties. Studies show it helps modulate the body's stress response, making it easier to wind down when life gets hectic. It's not just about sleep—it's about helping your whole system calm down.
Age-Related Sleep Changes
As we get older, deep sleep becomes harder to achieve. DSIP may help older adults reclaim some of that restorative delta-wave sleep that naturally declines with age. Research also shows impressive antioxidant effects, which adds anti-aging benefits on top of better sleep.
Athletic Recovery
Deep sleep is when your body does most of its repair work. By enhancing delta-wave sleep, DSIP can indirectly support recovery from intense training. Better sleep means better growth hormone release, better tissue repair, and better performance the next day.
Consider alternatives if
Do not use if
Use with caution if
Not sure?
Compare DSIP (Delta Sleep-Inducing Peptide) with similar peptides to find the best fit for your goals.
More comparisons coming soon.
04 · Administration
How do I use it?
Intravenous infusion (only route with human data) · Subcutaneous injection (community practice, untested)
Route
Subcutaneous injection (just under the skin)—simple and effective for self-administration
Best sites
Covers reconstitution · step-by-step technique · storage · a sample daily schedule.
05 · Safety
Is it safe?
4 common side effects · 1 serious
DSIP has only been tested in people a handful of times, in small studies run between 1981 and 1995. The individual studies were tiny: 6 healthy volunteers [3], 6 chronic insomniacs [4], 14 chronic insomniacs [1], 16 chronic insomniacs [7], and 20 healthy men [8]. Every one of them gave it through an IV drip in a clinic — never as a shot under the skin. Side effects were mild. In the first study in healthy people, all 6 volunteers had none at all: nothing showed up in how they felt, in how their bodies worked, or in their blood tests [3]. The 1987 trial that ran DSIP for 7 nights straight reported no daytime sedation and no side effects either [1]. No study ran longer than 7 nights in a row [1], so nobody knows what happens if you keep taking it. And no published study has tested DSIP as an injection under the skin or as a nasal spray — those routes are untested in people. You will often read that DSIP is "incredibly safe" with "no lethal dose." No published human study reports a lethal-dose figure. The largest total dose anyone has been given in a published trial is 4 mg, by slow IV infusion [8].
Six published studies have tested DSIP in people, and they do not agree with each other. The encouraging results mostly come from the same pair of researchers who discovered the peptide. One of their studies found longer, less interrupted sleep in 6 people with long-term insomnia [4]. Another followed 14 people treated over 7 consecutive nights and found both better night sleep and significantly better daytime alertness and mental performance [1]. Two other teams, working separately, did not find the same thing. One ran a double-blind crossover in chronic insomniacs and concluded the sleep improvement was "of little clinical significance" — the changes it saw were no different from the patients' own baseline [6]. The other, testing 16 patients double-blind, found the effect weak, said part of it might have come from an incidental change in the placebo group rather than from the peptide, and concluded DSIP was "not likely to be of major therapeutic benefit" [7]. A separate study checked whether DSIP lowers stress hormones in people, the way it appears to in cells and in animals. It does not — ACTH and cortisol responses were almost identical on DSIP and placebo, both after a hormone challenge and after a meal [8]. In every one of these studies the dose was given intravenously. Five used 25 nmol/kg, which works out to about 1.5 mg for a 155 lb (70 kg) adult [1][3][4][6][7]; the stress-hormone study used total doses of 3 and 4 mg [8].
Common side effects · experienced by some users
Less common
These typically resolve with continued use or dose adjustment.
Stop and seek help if
- ×Any signs of allergic reaction—hives, swelling, breathing difficulty (stop immediately, seek help)
- ×Severe or persistent headaches that don't respond to dose reduction
- ×Excessive daytime drowsiness affecting your ability to function
- ×Unusual mood changes or psychological symptoms
- ×You've completed your planned cycle (typically 4-6 weeks)
- ×Your healthcare provider recommends discontinuation
DSIP is a research peptide, not an FDA-approved medication. Always work with a qualified healthcare provider when using peptides. Never start, stop, or change doses without professional guidance. This information is educational—not medical advice.
With other peptides
- ✓Epitalon — Complementary pairing—Epitalon supports melatonin production while DSIP enhances delta sleep. Often used together for comprehensive sleep and anti-aging support.
- ✓CJC-1295/Ipamorelin — Can be used together. Growth hormone-releasing peptides benefit from better sleep quality. Use at different times of day for best results.
- ✓Selank — May enhance relaxation effects. Both have stress-modulating properties. Start with lower doses of each when combining.
- ✓BPC-157 — No known negative interactions. BPC-157 focuses on gut and tissue healing while DSIP targets sleep—different systems.
With medications
- !Benzodiazepines (Xanax, Valium, etc.) — Both enhance sleep/sedation—combining could cause excessive drowsiness. Consult your doctor before using together.
- !Z-drugs (Ambien, Lunesta) — Similar concern as benzodiazepines—additive sedation effects. Don't combine without medical supervision.
- ✓Antidepressants — Generally considered safe, but effects on sleep architecture may vary. Inform your prescribing doctor.
- ✓Blood pressure medications — DSIP may have mild cardiovascular effects. Monitor blood pressure if using both. Likely fine but worth watching.
With supplements
- ✓Melatonin — Can be used together at low melatonin doses (0.5-1mg). Both support sleep through different pathways. Don't overdo the melatonin.
- ✓Magnesium — Excellent combination. Magnesium supports relaxation and may enhance DSIP's effects. Magnesium glycinate is particularly good for sleep.
- ✓L-theanine — Safe and potentially synergistic. L-theanine promotes relaxation without sedation, complementing DSIP's sleep-promoting effects.
- ✓Valerian root — May have additive sedation effects. If combining, start with lower doses of both to assess total effect.
- ✓High-dose GABA supplements — Theoretical overlap in mechanisms. Use caution and lower doses when combining. Monitor for excessive drowsiness.
06 · Effectiveness
How do I know it's working?
Limited human trials · first signs days 1-3
Evidence level
Limited human trials
(six small IV studies, mixed results)
How it works
DSIP is a tiny protein (just 9 amino acids) that your brain naturally produces. It was discovered when scientists found that blood from sleeping rabbits could make other rabbits feel sleepy too. When you take DSIP, it works with your brain's existing sleep control systems—it doesn't force you to sleep like a drug would. Instead, it's like turning up the volume on your body's 'time to sleep' signals. It also helps calm your stress response, which is why it works especially well for people whose racing minds keep them awake.
DSIP (Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu) was first isolated from rabbit cerebral venous blood by Schoenenberger and Monnier in 1977. Despite decades of research, its exact mechanism remains incompletely characterized—no specific DSIP receptor has been definitively identified, and the DSIP gene has not been cloned. The peptide appears to modulate multiple neurotransmitter systems including GABA-ergic, glutamatergic (NMDA), and serotonergic pathways. It influences the hypothalamic-pituitary axis, affecting secretion of ACTH, cortisol, LH, and growth hormone. DSIP demonstrates stress-protective properties by modulating the body's response to various stressors at both metabolic and functional levels. Its antioxidant activity involves activation of superoxide dismutase, catalase, and ceruloplasmin while reducing lipid peroxidation. The peptide has an extremely short plasma half-life (7-8 minutes) but its sleep-promoting effects persist for hours, suggesting it triggers downstream signaling cascades rather than acting directly as a sedative. DSIP may function as a 'sleep-programming' substance that modulates 'local vigilance' states in the brain rather than inducing global sedation.
What to expect
Days 1-3
What you might notice
- •Feeling sleepy 1-2 hours after injection
- •Falling asleep faster than usual
- •Perhaps some vivid dreams
- •Possible mild headache or flushing (normal adjustment)
What's normal
- •Not feeling dramatic effects immediately—DSIP is subtle
- •Some adjustment side effects that fade quickly
- •Sleep may not be perfect yet—give it time
- •Waking at normal times even if you fell asleep faster
What's next
- →Continue at starting dose through the first week
- →Keep a simple sleep log to track changes
- →Maintain good sleep hygiene habits alongside DSIP
Week 1-2
What you might notice
- •More consistent sleep onset—falling asleep at similar times
- •Deeper sleep with fewer nighttime awakenings
- •Feeling more refreshed upon waking
- •Improved daytime alertness and mood
What's normal
- •Gradual improvement rather than overnight transformation
- •Some nights still variable—that's normal
- •Dreams may be more memorable
- •Side effects (if any) typically diminishing
What's next
- →Assess whether to stay at current dose or increase
- →Continue tracking sleep quality
- →If minimal improvement after 2 weeks, consider moving to standard dose
Week 3-4
What you might notice
- •More established sleep patterns
- •Consistent sleep duration (7-9 hours feeling natural)
- •Better stress handling during the day
- •Improved mental clarity and cognitive function
What's normal
- •Sleep benefits should be clearly noticeable by now
- •Your body has adapted—side effects should be minimal
- •Sleep quality may plateau at a new, better baseline
- •Energy levels throughout the day more stable
What's next
- →Decide whether to continue for the full 4-6 week cycle
- →Consider if your sleep goals are being met
- →Plan for eventual cycling off to assess baseline improvements
Week 5-6+
What you might notice
- •Well-established healthy sleep patterns
- •Robust stress resilience
- •Maximum benefits from the cycle achieved
- •Consistent, refreshing sleep most nights
What's normal
- •Benefits have likely reached their peak
- •You've established new sleep habits that support the peptide's effects
- •Time to consider completing this cycle
- •Sleep quality stable and predictable
What's next
- →Complete your cycle and take a break (2-4 weeks)
- →Assess how well you sleep without DSIP
- →Many find their sleep stays improved even after stopping
- →Consult with your provider about future cycles if needed
Signs it's working · Sleep Quality Improvements
- ✓Falling asleep within 20-30 minutes instead of lying awake
- ✓Sleeping through the night with minimal or no awakenings
- ✓Waking naturally before your alarm
- ✓Feeling genuinely rested and refreshed in the morning
- ✓Dreaming more (indicates healthy REM sleep)
- ✓Consistent sleep schedule emerging naturally
Signs it's working · Daytime Benefits
- ✓Improved mental clarity and focus
- ✓Better mood and emotional stability
- ✓More energy throughout the day without afternoon crashes
- ✓Enhanced stress tolerance—things don't bother you as much
- ✓Improved physical performance and recovery
Signs it's working · Long-term Indicators
- ✓Sleep improvements that persist even on break periods
- ✓Healthier sleep habits becoming automatic
- ✓Reduced reliance on sleep aids or supplements
- ✓Overall better quality of life from improved rest
Not seeing results? Common reasons
- •Dose too low—if no improvement after 2 weeks at starting dose, consider increasing
- •Poor timing—inject 1-2 hours before bed, not right at bedtime or too early
- •Sleep environment issues—DSIP can't overcome a noisy, bright, or uncomfortable bedroom
- •Stimulant use too late—caffeine, nicotine, or screens before bed will fight DSIP's effects
- •Underlying sleep disorder—conditions like sleep apnea need medical treatment, not peptides
- •Peptide degradation—check storage conditions and solution appearance
- •Not enough time—give it at least 2-3 weeks of consistent use before judging
- •Unrealistic expectations—DSIP improves natural sleep, it doesn't induce coma
Key research
07 · Clinical trials
Tested in people
No registered clinical trial of DSIP (Delta Sleep-Inducing Peptide) was found in the public registries.
That does not mean nobody has studied it — laboratory and animal work is not registered anywhere. It means no study has been declared in advance where regulators and the public can see it, so there are no stated endpoints and no results anyone is obliged to report.
08 · Questions
Frequently asked
Will DSIP make me feel drugged or groggy the next morning?+
No—that's one of the best things about DSIP. Unlike sleeping pills that force sedation and leave you foggy, DSIP works with your natural sleep systems. Studies consistently show improved daytime alertness and performance, not grogginess. You wake up feeling refreshed because you actually got better quality sleep, not because you were knocked unconscious.
How quickly will I notice results?+
Many people notice subtle improvements within the first few nights—falling asleep faster, sleeping more soundly. However, the full benefits typically develop over 1-2 weeks of consistent use. DSIP helps reset your sleep patterns, and that process takes time. Think of it as retraining your brain to sleep well rather than a one-night quick fix.
Is DSIP addictive?+
No, DSIP has not shown addictive properties in research. Unlike benzodiazepines or Z-drugs, it doesn't work by hijacking your GABA receptors in a way that creates dependency. People can stop using DSIP without withdrawal symptoms. In fact, many find their sleep improvements persist after stopping because DSIP helped normalize their underlying sleep patterns.
Can I take DSIP every night?+
Most protocols use DSIP nightly for 4-6 week cycles, followed by a break period. Some researchers suggest using it just a few times per week to prevent any potential tolerance. Work with your healthcare provider to determine the best approach for your situation. Taking breaks also helps you assess whether your sleep has improved independently.
Is DSIP FDA approved?+
No, DSIP is classified as a research compound and is not FDA approved for any medical use. While human studies dating back to the 1980s support its safety and effectiveness, it hasn't gone through the full FDA approval process. This means it's only available for research purposes or through certain specialized clinics.
What's the difference between DSIP and melatonin?+
They work differently. Melatonin is a hormone that signals 'darkness' to your brain, helping regulate your circadian clock. DSIP appears to directly promote delta-wave (deep) sleep through multiple brain pathways. Melatonin helps you fall asleep at the right time; DSIP helps you sleep deeper once you're there. Some people use low-dose melatonin alongside DSIP for comprehensive sleep support.
Can DSIP help with jet lag?+
Yes, DSIP may be particularly helpful for jet lag because it influences circadian rhythm regulation. Its effects on normalizing sleep-wake patterns can help your body adjust to new time zones faster. Combined with proper light exposure and perhaps low-dose melatonin, DSIP can be a useful tool for frequent travelers.
Why does DSIP have such a short half-life but long-lasting effects?+
This puzzled researchers too! DSIP breaks down in the blood within minutes, yet its sleep-promoting effects last for hours. The current theory is that DSIP triggers downstream signaling cascades in the brain—it's like pushing the first domino that starts a chain reaction. Once those sleep-promoting pathways are activated, they keep working even after the original peptide is gone.
09 · Further reading
History & related research
Studied for