DSIP
Animal studies onlyAlmost all the research is in animals. We do not know if the same thing happens in people.
Also called Delta Sleep-Inducing Peptide / Emideltide
Named for its effect on deep sleep in rabbits. Human evidence is thin and inconsistent.
Can a doctor prescribe this?
No. It was reviewed and turned down.
The FDA has not approved this as a medicine.
An FDA advisory panel voted against this one in July 2026, 6-7. It was the only rejection of the seven reviewed.
Official status: Declined for the 503A bulks list. Checked 2026-07-24.
Lab suppliers we list: 6
Doses used in research
Taken word for word from the studies and trials listed on this page. This is not a recommendation and not a dose for anyone to take.
In animal studies
These are doses given to animals, usually per kilogram of body weight. They do not convert directly to a human dose.
120 mcg/kg
rats · nasal spray · for 7 days
Delta Sleep-Inducing Peptide Recovers Motor Function in SD Rats after Focal Stroke.Molecules (Basel, Switzerland) · 2021
“DSIP or vehicle was applied nasally 60 (±15) minutes prior to the occlusion and for 7 days after reperfusion at dose 120 µg/kg.”
See source wording
rats · daily
Phosphorylated delta sleep inducing peptide restores spatial memory and p-CREB expression by improving sleep architecture at high altitude.Life sciences · 2018
“p-DSIP was injected intra-peritoneally (10 μg/Kg bw) during HH exposure as an intervention against sleep alteration.”
2 mg/kg
mice · under the skin
Expression and Purification of Delta Sleep-Inducing Peptide Fused with Protein Transduction Domain and Human Serum Albumin in Pichia pastoris.Protein and peptide letters · 2017
“Mice were administered single subcutaneous injections three concentrations of PHD fusion protein (0.5, 1, 2 mg/kg), and the pharmacological activity of PHD fusion protein was studied using classic pentobarbitalinduced sleep test.”
See source wording
rats · another route
[THE INFLUENCE OF DELTA SLEEP-INDUCING PEPTIDE ON FUNCTIONAL STATE OF RATS HEPATOCYTES IN FOOT-SHOCK STRESS].Rossiiskii fiziologicheskii zhurnal imeni I.M. Sechenova · 2015
“The effect of delta sleep-inducing peptide (DSIP) intraperitoneal injection in the doses of 40, 120, 360, and 1080 mcg/kg b.”
100 mcg/kg
rats · under the skin
[Influence of delta-sleep inducing peptide on the state of lysosomal membranes and intensity of lysosomal proteolysis in different rat tissues during physiological aging of the organism].Advances in gerontology = Uspekhi gerontologii · 2014
“It is shown that subcutaneous injection of exogenous delta-sleep inducing peptide (DSIP) to rats aged 2-24 months in a dose of 100 μg/kg animal body weight by courses of 5 consecutive days per month has a stabilizing effect on the state of lysosomal membranes in rat tissues (brain, heart muscle and liver) at different ontogenetic stages, and this effect is accompanied by increasing intensity of lysosomal proteolysis in these tissues.”
100 mcg/kg
rats · under the skin
[Influence of delta-sleep peptide on the enzymes activity of mitochondrial electron transport chain in various rat tissues during aging of the organism].Advances in gerontology = Uspekhi gerontologii · 2014
“It is shown that subcutaneous injection of exogenous delta-sleep inducing peptide (DSIP) to rats aged 2-24 months in a dose of 100 μg/kg animal body weight by courses of 5 consecutive days per month has a stabilizing effect on the NADH-dehydrogenase activity in the mitochondrial fractions of various tissues, which together with increasing capacity of the antioxidant system should reduce the production of free radicals and their adverse action on cells macromolecule, herewith the activity of succinate dehydrogenase did not change.”
100 g
rats · under the skin
[Metabolic effects of delta-sleep inducing peptide during physiological aging of the organism].Eksperimental'naia i klinicheskaia farmakologiia · 2013
“Subcutaneous injection of delta-sleep inducing peptide (DSIP) to postnatal rats (aged from 2 to 24 months) during 5 consecutive days every months at a dose of 10 microg/100 g body weight favors normalization of the age-related changes in carbohydrate metabolism and shows hypoglycemic effect, as manifested by a decrease in the level of glycosylated hemoglobin in erythrocytes of test rats.”
See source wording
rats · another route
Dizocilpine and cycloheximide prevent inhibition of c-Fos gene expression by delta sleep-inducing peptide in the paraventricular nucleus of the hypothalamus in rats with different resistance to emotional stress.Neuroscience letters · 2012
“The experiments show that intraperitoneal (i.p.) DSIP injection (60 nmol/kg) decreased the number of Fos-immunoreactive (Fos-IR) cells in the pPVN, activated by immobilization.”
100 mg/kg
rats · under the skin
[Effect of delta-sleep inducing peptide on the functional activity of some organs and tissues of rats during physiological aging].Advances in gerontology = Uspekhi gerontologii · 2012
“The authors show that exogenous delta-sleep inducing peptide (DSIP) injected subcutaneously to the rats in the age of 2-24 months of postnatal development in a dose of 100 mg/kg of animal body weight in courses for 5 consecutive days every month, has a hepatoprotective effect.”
100 g
rats · under the skin
[Mechanism of delta-sleep inducing peptide geroprotective activity].Advances in gerontology = Uspekhi gerontologii · 2011
“It is shown that the subcutaneous injection to the rats in the age from 2 to 24 months during 5 consecutive days every month with 10 microg/100 g body weight of delta-sleep inducing peptide (DSIP) suppresses lipid peroxidation preventing the increasing of malonic dialdehyde level in rats tissues and plasma, possesses a powerful antioxidant effect, which is realized by means of the activation of different endogenous antioxidant defense system of cell and extracellular fluid, including high- and low-molecular regulators of free radical processes.”
- <i>Pichia pastoris</i> secreted peptides crossing the blood-brain barrier and DSIP fusion peptide efficacy in PCPA-induced insomnia mouse models.
Animal study, rats or mice
Frontiers in pharmacology · 2024
- Delta Sleep-Inducing Peptide Recovers Motor Function in SD Rats after Focal Stroke.
Animal study, rats or mice
Molecules (Basel, Switzerland) · 2021
- DSIP-Like KND Peptide Reduces Brain Infarction in C57Bl/6 and Reduces Myocardial Infarction in SD Rats When Administered during Reperfusion.
Animal study, rats or mice
Biomedicines · 2021
- Phosphorylated delta sleep inducing peptide restores spatial memory and p-CREB expression by improving sleep architecture at high altitude.
Animal study, rats or mice
Life sciences · 2018
- Expression and Purification of Delta Sleep-Inducing Peptide Fused with Protein Transduction Domain and Human Serum Albumin in Pichia pastoris.
Animal study, rats or mice
Protein and peptide letters · 2017
- [THE INFLUENCE OF DELTA SLEEP-INDUCING PEPTIDE ON FUNCTIONAL STATE OF RATS HEPATOCYTES IN FOOT-SHOCK STRESS].
Animal study, rats or mice
Rossiiskii fiziologicheskii zhurnal imeni I.M. Sechenova · 2015
- [Influence of delta-sleep inducing peptide on the state of lysosomal membranes and intensity of lysosomal proteolysis in different rat tissues during physiological aging of the organism].
Animal study, rats or mice
Advances in gerontology = Uspekhi gerontologii · 2014
- [Influence of delta-sleep peptide on the enzymes activity of mitochondrial electron transport chain in various rat tissues during aging of the organism].
Animal study, rats or mice
Advances in gerontology = Uspekhi gerontologii · 2014
- [Effects of the δ-sleep inducing peptide on neuronal activity in the dorsal hippocampus of rats with different behavior in the open field after stimulation of the positive and negative emotionalistic structures of the brain].
Animal study, rats or mice
Zhurnal vysshei nervnoi deiatelnosti imeni I P Pavlova · 2013
- [Metabolic effects of delta-sleep inducing peptide during physiological aging of the organism].
Animal study, rats or mice
Eksperimental'naia i klinicheskaia farmakologiia · 2013
- Dizocilpine and cycloheximide prevent inhibition of c-Fos gene expression by delta sleep-inducing peptide in the paraventricular nucleus of the hypothalamus in rats with different resistance to emotional stress.
Animal study, rats or mice
Neuroscience letters · 2012
- [Effect of delta-sleep inducing peptide on the functional activity of some organs and tissues of rats during physiological aging].
Animal study, rats or mice
Advances in gerontology = Uspekhi gerontologii · 2012
- [Mechanism of delta-sleep inducing peptide geroprotective activity].
Animal study, rats or mice
Advances in gerontology = Uspekhi gerontologii · 2011
- [Changes in duodenal lymphoid structures in rats with various behavioral activity, caused by delta sleep-inducing peptide and following acute emotional stress].
Animal study, rats or mice
Morfologiia (Saint Petersburg, Russia) · 2010
- [Antioxidative and detoxifying effects of analogues of delta-sleep inducing peptide (DSIP)].
Lab dish study
Bioorganicheskaia khimiia · 2014
- [Delta-sleep inducing peptide entrapment and release from polymer hydrogels based on modified polyvinyl alcohol in vitro].
Lab dish study
Biomeditsinskaia khimiia · 2013
- Sensing the Bactericidal and Bacteriostatic Antimicrobial Mode of Action Using Raman Deuterium Stable Isotope Probing (DSIP) in <i>Escherichia coli</i>.
ACS omega · 2024
- Sensing the bactericidal and bacteriostatic antimicrobial mode of action using Raman-Deuterium stable isotope probing (DSIP)
Journal not recorded · 2024
- Practical N-to-C peptide synthesis with minimal protecting groups.
Communications chemistry · 2023
- Protecting Group-Minimum, Practical N-to-C Peptide Synthesis
Journal not recorded · 2023
- Delta-sleep inducing peptide entrapment in the charged macroporous matrices.
Materials science & engineering. C, Materials for biological applications · 2014
- [Olygopeptide KND as a putative endogenous prototype of delta sleep inducing peptide (DSIP). Comparative study of biological properties].
Bioorganicheskaia khimiia · 2013
- Protein isoaspartate methyltransferase-mediated 18O-labeling of isoaspartic acid for mass spectrometry analysis.
Analytical chemistry · 2012
- JmjC-domain-containing histone demethylases of the JMJD1B type as putative precursors of endogenous DSIP.
Peptides · 2011
- Delta sleep-inducing peptide alters bispectral index, the electroencephalogram and heart rate variability when used as an adjunct to isoflurane anaesthesia.
European journal of anaesthesiology · 2009
- Therapeutic Peptides in Orthopaedics: Applications, Challenges, and Future Directions.
Review of earlier work
Journal of the American Academy of Orthopaedic Surgeons. Global research & reviews · 2026
- Domain-specific information preservation for Alzheimer's disease diagnosis with incomplete multi-modality neuroimages.
Review of earlier work
Medical image analysis · 2025