DSIP: what it is and what the evidence says
A naturally occurring nonapeptide, known as delta sleep-inducing peptide, studied for its relationship with sleep regulation and the stress response. Its receptor has not been identified yet, and its best-described effect is lowering stress-axis activation.
Last reviewed: August 16, 2026 · How we verify this
The ground it plays on
The brain adapts by forming and strengthening connections. Neurotransmitters take part in that conversation, along with factors that help neurons survive and grow. Compounds in this group are studied for their relationship with focus, memory, mood or neuroprotection — and it is worth saying plainly that this is the area where claims are most exaggerated and where human evidence is thinnest.
What it is studied for
Sleep quality, recovery, stress management.
There is a distinction that almost always gets lost. A compound being studied for something is not the same as achieving it. And even where it works in a dish or in a mouse, that says little about whether it works in a person or whether the benefit is worth the risk. The section below therefore carries more weight than everything above it.
What the human evidence says
It was tested in people between 1981 and 1998, always intravenously and in small studies: chronic insomnia (groups of 6 to 18 people), opioid and alcohol withdrawal, and a single narcolepsy case. The 1992 double-blind trial, with 16 patients, found somewhat more efficient sleep and faster sleep onset than placebo, an effect its authors considered weak.
The limitation that matters most
Its receptor and its gene still need to be identified, how much reaches the brain in people has not been measured, and the subcutaneous and intranasal routes used today have not been studied in people. There are also no long safety trials and no systematic record of adverse effects.
Regulatory status
Not approved by the FDA or the EMA. In April 2026 the FDA removed it from Category 2 of bulk substances for compounding, and on July 24, 2026 its advisory committee voted 7 to 6, with one abstention, against adding it to the 503A list. It does not appear by name on the 2026 WADA Prohibited List; as an unapproved substance it may fall under category S0, so anyone who competes under anti-doping testing should confirm its status with their federation.
Status can change and varies by country. Always verify the rules in force where you live before drawing conclusions.
Cautions and context
The human studies were small and intravenous, so the response varies widely from person to person. Watch for daytime sleepiness, injection-site reactions, and stacking with sedatives, alcohol, or opioids.
With a diagnosed sleep disorder, snoring with breathing pauses, pregnancy, or sedative, antidepressant, or opioid medication, have a professional assess it before you start and while you are on it.
What this page cannot give you
A reference page can take you this far. You know what DSIP is and where its research stands, which already puts you ahead of most readers. Four questions remain that no encyclopedia can answer for you, because the answers depend on your own situation:
- What would you measure beforehand, so that later you could tell whether anything actually changed?
- What would you watch along the way, and how consistently?
- What would you ask a professional, and in how much detail, so you do not walk out with a textbook answer?
- What would make you stop?
That is what the course is for
PeptiXtreme is ${CIF.LECCIONES} lessons that hand out no numbers. Each one ends with your starting point, what to watch along the way, the specific questions you take to a professional and the signals that mean stop. It includes per-module exams, a Certificate of Completion with a verifiable certificate ID, a Progress Tracker to follow how you are doing, and a human advisor you can actually write to.
See the course → Or measure your judgment, freeReferences
Every entry links to its record on PubMed, the US National Library of Medicine database. Open them and check. We would rather have a reader who verifies than one who takes our word for it.
- Delta sleep-inducing peptide (DSIP): a still unresolved riddlereview J Neurochem · 2006 · PMID 16539679 →
- Delta-sleep-inducing peptide (DSIP): a reviewreview Neurosci Biobehav Rev · 1984 · PMID 6145137 →
- Delta-sleep-inducing peptide (DSIP): an updatereview Peptides · 1986 · PMID 3550726 →
- Effects of delta sleep-inducing peptide on sleep of chronic insomniac patients. A double-blind studyhuman Neuropsychobiology · 1992 · PMID 1299794 →
- Effects of delta-sleep-inducing peptide on 24-hour sleep-wake behaviour in severe chronic insomniahuman Eur Neurol · 1987 · PMID 3622582 →
- Synthetic delta-sleep-inducing peptide improves sleep in insomniacshuman Lancet · 1981 · PMID 6112579 →
- Delta Sleep-Inducing Peptide Recovers Motor Function in SD Rats after Focal Strokepreclinical Molecules · 2021 · PMID 34500605 →
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Frequently asked questions
What is DSIP?
A naturally occurring nonapeptide, known as delta sleep-inducing peptide, studied for its relationship with sleep regulation and the stress response. Its receptor has not been identified yet, and its best-described effect is lowering stress-axis activation. It is studied within the area of cognitive.
Is there human evidence for DSIP?
It was tested in people between 1981 and 1998, always intravenously and in small studies: chronic insomnia (groups of 6 to 18 people), opioid and alcohol withdrawal, and a single narcolepsy case. The 1992 double-blind trial, with 16 patients, found somewhat more efficient sleep and faster sleep onset than placebo, an effect its authors considered weak.
Is it approved by any health agency?
Not approved by the FDA or the EMA. In April 2026 the FDA removed it from Category 2 of bulk substances for compounding, and on July 24, 2026 its advisory committee voted 7 to 6, with one abstention, against adding it to the 503A list. It does not appear by name on the 2026 WADA Prohibited List; as an unapproved substance it may fall under category S0, so anyone who competes under anti-doping testing should confirm its status with their federation.
What is the dose of DSIP?
We do not publish dosages. This is not an oversight. No single figure works for everyone: the regimen depends on a person's medical history, on whatever medication they already take, and on the goal they are chasing, which is something a professional weighs with the case in front of them. What you can build is the ability to walk into that appointment knowing what to ask.
Where can I learn to evaluate this properly?
This page tells you what DSIP is and what the evidence says. The PeptiXtreme course teaches the other half: what you would measure before considering anything, what you would watch, the specific questions you would take to a professional and when you would stop.