Sleep
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.
Start here
DSIP (Delta Sleep-Inducing Peptide) is a small peptide of nine amino acids that the brain produces naturally, discovered when blood from sleeping rabbits made other rabbits drowsy. It is studied for promoting deep, restorative sleep by working with the body's own sleep signals rather than sedating it. Human evidence is thin — six small IV studies with mixed results — and it is a research compound, not FDA approved.
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 the blood of a rabbit's brain veins by Schoenenberger and Monnier in 1977. Despite decades of research, how it works is still not fully understood. No specific DSIP receptor (docking site) has been clearly identified, and the DSIP gene has not been cloned. It seems to adjust several brain chemical systems, including GABA (the brain's main calming messenger), glutamate (acting at NMDA receptors) and serotonin pathways. It affects the hypothalamic-pituitary (the master hormone gland at the base of the brain) axis (the brain's control center for hormones), changing the release of ACTH, cortisol (the stress hormone), LH and growth hormone. DSIP shows stress-protective effects by adjusting how the body responds to different stressors, both in metabolism and in function. Its antioxidant action involves switching on superoxide dismutase, catalase and ceruloplasmin (protective enzymes and proteins) while reducing lipid peroxidation (damage to fats by oxygen). In the blood it lasts a very short time (half-life (how long it stays active in your body) of 7-8 minutes), yet its sleep-promoting effects last for hours. This suggests it sets off a chain of signals downstream rather than acting directly as a sedative. DSIP may act as a 'sleep-programming' substance that adjusts 'local vigilance' states (how alert a brain area is) rather than putting the whole brain to sleep.
Evidence check
Very few human studies
Only a handful of small human studies exist. Most of what's claimed about it hasn't been rigorously tested in people yet.
Every numbered marker on this page links to one of the 8 sources at the bottom.
Sleep Quality
Six small intravenous human trials, mixed results. Two from the discovering group found longer, less interrupted sleep and significantly better daytime alertness. Two independent double-blind trials found the benefit small or not clinically significant.
Stress Protection
Effects on stress hormones were reported in cells and in animals. The one human study to test it directly found DSIP does not change ACTH (the brain hormone that tells the body to make cortisol) or cortisol (the main stress hormone). Responses were almost identical to placebo after both a hormone challenge and a meal. On this point the human evidence contradicts the animal finding.
Safety Profile
Small numbers, all intravenous, none longer than seven consecutive nights. The largest published human study enrolled 20 men. Side effects reported were mild; the first study in healthy volunteers found none at all across symptom, physiological and blood measures. Long-term use, and the subcutaneous and intranasal routes, are untested in people.
The most-asked question
The research-reported range is No standard dose range on file. Studies used different doses for different situations — find yours:
Clinical research, Insomnia studies
25 nmol/kg (about 1.5 mg for a 70 kg adult)
The only DSIP dose with human evidence. Source class: clinical trial protocol. Five published trials used 25 nmol/kg as a slow intravenous infusion under medical supervision — about 1.5 mg for a 155 lb (70 kg) adult 13467 — and one used total doses of 3 to 4 mg the same way 8. Results were mixed: two independent double-blind trials found the sleep benefit small or not clinically significant 67. See the evidence note.
Sleep support, First-time users
100 mcg
Source class: community practice, not peer-reviewed. No human study has used subcutaneous (under the skin) DSIP at any dose. This figure comes from vendor and forum protocols, not from the trial literature — the published human dose is roughly 1.5 mg intravenously, about 15x this amount by a different route. 12
Sleep support, Sleep quality
200 mcg
Source class: community practice, not peer-reviewed. The most commonly circulated figure for subcutaneous (under the skin) use, and it appears in no published study. Subcutaneous DSIP has never been tested in humans, so neither its absorption nor its safety by this route is known. 12
Sleep support
300 mcg
Source class: community practice, not peer-reviewed. Upper end of circulated subcutaneous (under the skin) figures. No controlled trial supports this dose, this route, or escalation between these steps — the three subcutaneous rows are reported practice, not a studied titration (stepping the dose up gradually). 12
Needle-free option, Sleep support
200–300 mcg
Source class: community practice, not peer-reviewed. Intranasal DSIP has no published human study. Nasal absorption of a 9-amino-acid peptide has not been characterised, so a per-dose amount copied from the injectable route has no basis. 1
The ceiling: 300-500 mcg once daily (based on available research protocols)
Reconstitution, in plain words
Peptides usually arrive as a freeze-dried powder in a small vial. “Reconstitution” just means adding sterile water back in so you can measure a dose. Here's how it works for DSIP (Delta Sleep-Inducing Peptide):
For a 2mg vial: Add 2mL of bacteriostatic water. This gives you 1mg/mL (1000 mcg/mL). For a 200mcg dose, you'll draw 0.2mL (20 units on an insulin syringe).
At 1000 mcg/mL concentration: 100mcg = 0.1mL (10 units), 200mcg = 0.2mL (20 units), 300mcg = 0.3mL (30 units). Always double-check your math!
Three quick questions — your vial, your water, your dose — and it tells you the exact syringe mark. “Find dose amount” is preloaded with DSIP (Delta Sleep-Inducing Peptide)'s recorded schedule.
Injection sites & technique
Subcutaneous (under the skin) injection (just under the skin)—simple and effective for self-administration
Timing
Evening, 1-2 hours before your intended bedtime. DSIP doesn't knock you out instantly—it works with your body's natural sleep systems, so give it time to take effect.
Can be taken with or without food. Some people prefer taking it on an empty stomach for potentially faster absorption, but food doesn't block its effects.
If using with other peptides like CJC-1295 or Ipamorelin for growth hormone support, inject at different sites. DSIP is typically taken alone in the evening while growth hormone peptides may be used at other times.
The honest list
These show up most often. They usually fade as your body adjusts.
The most frequently reported side effect. Usually appears within an hour of injection and resolves on its own.
What to do Stay well-hydrated. If persistent, try reducing your dose. Over-the-counter pain relievers can help if needed, but usually aren't necessary.
Some people feel slightly lightheaded shortly after injection. This is usually mild and passes within 15-30 minutes.
What to do Sit or lie down after injecting until it passes. Make sure you're not injecting on an empty stomach if this bothers you.
A temporary sensation of warmth, sometimes with mild skin flushing. Completely harmless and usually brief.
What to do This is normal and passes on its own. Stay in a comfortable environment and relax—you're about to sleep anyway!
Minor redness, tenderness, or slight swelling where you injected. Very common with any injectable.
What to do Rotate injection sites to give each area time to recover. Ensure proper injection technique. Cool compress can help if bothersome.
Worth knowing about, but most people never see these.
Some users report more vivid or memorable dreams. Most find this neutral or even pleasant—a sign of improved REM sleep.
What to do Usually no management needed. If dreams become disturbing, try reducing your dose. This often settles after the first week.
Occasional stomach discomfort, especially when starting. Usually mild and doesn't last long.
What to do Try taking DSIP with a light snack. Ginger tea can help settle the stomach. Reduce dose if it persists.
Rare, but if any of these happen, stop and contact a medical professional.
Rare, but possible with any peptide. Signs include hives, significant swelling (especially face/throat), difficulty breathing, or severe rash.
What to do STOP using immediately and seek medical attention. If you have a history of peptide allergies, have antihistamines ready and consider medical supervision for first use.
Week by week
Is it right for you?
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.
Both enhance sleep/sedation—combining could cause excessive drowsiness. Consult your doctor before using together.
Similar concern as benzodiazepines—additive sedation effects. Don't combine without medical supervision.
Generally considered safe, but effects on sleep architecture may vary. Inform your prescribing doctor.
DSIP may have mild cardiovascular effects. Monitor blood pressure if using both. Likely fine but worth watching.
Complementary pairing—Epitalon supports melatonin production while DSIP enhances delta sleep. Often used together for comprehensive sleep and anti-aging support.
Can be used together. Growth hormone-releasing peptides benefit from better sleep quality. Use at different times of day for best results.
May enhance relaxation effects. Both have stress-modulating properties. Start with lower doses of each when combining.
No known negative interactions. BPC-157 focuses on gut and tissue healing while DSIP targets sleep—different systems.
Can be used together at low melatonin doses (0.5-1mg). Both support sleep through different pathways. Don't overdo the melatonin.
Excellent combination. Magnesium supports relaxation and may enhance DSIP's effects. Magnesium glycinate is particularly good for sleep.
Safe and potentially synergistic. L-theanine promotes relaxation without sedation, complementing DSIP's sleep-promoting effects.
May have additive sedation effects. If combining, start with lower doses of both to assess total effect.
Theoretical overlap in mechanisms. Use caution and lower doses when combining. Monitor for excessive drowsiness.
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.
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.
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.
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.
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.
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 study (neither patients nor researchers knew who got DSIP, and each patient tried both DSIP and placebo) 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 (the brain hormone that tells the body to make cortisol (the stress hormone)) and cortisol (the main stress hormone) 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 13467; the stress-hormone study used total doses of 3 and 4 mg 8.
Keeping it good
Keep your DSIP powder in the freezer (-20°C/-4°F or colder). Store in its original sealed vial, protected from light. A properly stored vial can remain stable for up to 24 months. Never leave powder at room temperature for extended periods.
Once mixed with bacteriostatic water, immediately refrigerate at 36-46°F (2-8°C). Keep the vial upright and away from light. Use within 28 days. Never freeze the reconstituted solution—this destroys the peptide.
Not our opinion — the published record
1987
In chronic insomniacs, DSIP substantially improved night sleep from the first dose and continued improving with repeated treatment. Efficiency of night sleep and daytime rest reached normal levels, and participants showed increased alertness and mental performance during the day.
Schneider-Helmert D
1983
Human studies confirmed DSIP promotes natural sleep with effects lasting up to 20 hours after a single dose. Beyond sleep, DSIP improved daytime alertness, performance, stress tolerance, and coping ability—showing it does much more than just help you fall asleep.
Schneider-Helmert D, Schoenenberger GA
1981
In healthy volunteers, DSIP increased total sleep time by 59% during the day and improved subsequent night sleep quality. Importantly, there was no classic sedation—subjects maintained normal alertness when awake. The compound was well-tolerated with no psychological, physiological, or biochemical side effects.
Graf MV, Kastin AJ
1981
Chronic insomniacs receiving DSIP had longer sleep duration, higher quality sleep with fewer interruptions, and slightly more REM sleep—but no daytime sedation. The sleep-promoting effects lasted up to 6 hours through the night.
Schneider-Helmert D, Schoenenberger GA
2011
DSIP showed strong antioxidant effects in aging rats, switching on the body's natural antioxidant defenses, including superoxide dismutase, catalase and ceruloplasmin (protective enzymes and proteins). This suggests DSIP may have anti-aging benefits beyond better sleep.
Bondarenko TI, Maĭboroda EA, Mikhaleva II
1987
A double-blind crossover study (each patient got both DSIP and placebo, and no one knew which) in chronic insomniacs, 25 nmol/kg intravenously (into a vein) across four nights. Night-time awakenings, time awake and time to fall into non-REM sleep (deep, non-dreaming sleep) all fell on DSIP, but none of those changes was significantly different from the patients' own baseline or from the double-blind placebo nights. Total sleep time and non-REM sleep did rise significantly versus placebo, but the same gap was already present in the baseline values. The authors concluded that the sleep improvement is "of little clinical significance."
Monti JM, Debellis J, Alterwain P, Pellejero T, Monti D
1992
Sixteen chronic insomniacs, double-blind, matched pairs, parallel groups (two matched groups, each getting one treatment), five consecutive nights in a sleep laboratory. Half received 25 nmol/kg DSIP intravenously (into a vein) in the afternoon before nights 3, 4 and 5; half received a glucose placebo. Sleep efficiency (the share of time in bed spent asleep) was higher and sleep latency (time to fall asleep) shorter on DSIP. The authors judged those effects weak, noted they could in part be due to an incidental change in the placebo group, found no change in subjective sleep quality or any other measure, and concluded that short-term DSIP treatment of chronic insomnia is "not likely to be of major therapeutic benefit."
Bes F, Hofman W, Schuur J, Van Boxtel C
1995
The only human study to test DSIP's reported stress-hormone effect directly. Healthy young men received DSIP intravenously (into a vein), in total doses of 3 and 4 mg, against placebo, first around a corticotropin-releasing hormone challenge (a test that triggers a stress-hormone response; 5 men per condition) and then around a midday meal (10 more men). ACTH and cortisol (stress hormone) responses were almost identical on DSIP and on placebo in both experiments. The authors concluded their data "do not support an inhibitory role of DSIP on ACTH and cortisol secretion in man," which is the opposite of what had been reported in cells and in animals.
Spath-Schwalbe E, Schafer A, Uthgenannt D, Born J, Fehm HL
If this isn't the right fit
Your questions
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.
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.
No, DSIP has not shown addictive properties in research. Unlike benzodiazepines or Z-drugs (prescription sleeping pills), it doesn't work by hijacking your GABA receptors (the brain's main calming switches) 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.
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.
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.
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.
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.
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 sets off a chain of signals in the brain. It's like pushing the first domino. Once those sleep-promoting pathways are switched on, they keep working even after the original peptide is gone.
8 sources
Every numbered marker on this page points to one of these. Same sources, same numbering as the DSIP (Delta Sleep-Inducing Peptide) research profile on Peptide Initiative.
Want the deep science?
Every claim on this page traces back to the research database behind Peptide Initiative — studies, citations, clinical trial data, and the technical detail we deliberately left out here.
Open the research profileThis guide is education, not medical advice. DSIP (Delta Sleep-Inducing Peptide) is a research compound that is not FDA-approved for human use. Talk to a clinician before taking anything.
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