DSIP

Mechanism

In plain terms, DSIP was discovered as a blood-borne factor that seemed to encourage deep sleep, but exactly how it works remains uncertain. Technically, it is a small amphiphilic nonapeptide (Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu) that can cross the blood-brain barrier and has been reported to influence neurotransmitter and neuroendocrine systems (including effects on corticotropin and other hormones) and circadian regulation. No single well-defined receptor has been established, and its physiological role is still debated.

Regulatory Status by Region

• United States (FDA)Not FDA-approved; an experimental peptide with no approved therapeutic use. On July 24, 2026, the FDA Pharmacy Compounding Advisory Committee voted 6-7, with one abstention, against recommending emideltide, the delta sleep-inducing peptide nominated under the DSIP name, for the Section 503A Bulk Drug Substances List, citing insufficient safety and efficacy data for insomnia, narcolepsy and opioid use disorder; it was the only one of seven nominated peptides not recommended.
• Australia (TGA)Not on the ARTG; an unapproved experimental substance.
• European Union (EMA)No EMA marketing authorisation; not an approved medicine in the EU.
• WADANot listed by name on the Prohibited List; as a non-approved substance, athletes should verify current status with their anti-doping organisation.

See the full regulatory status matrix

Key Studies

• Characterization of a delta-electroencephalogram (-sleep)-inducing peptide (Schoenenberger and Monnier) (opens in a new tab) (Proc Natl Acad Sci U S A 1977;74(3):1282-1286; DOI 10.1073/pnas.74.3.1282; PMID 265572)
• Delta sleep-inducing peptide (DSIP): a still unresolved riddle (Kovalzon et al.) (opens in a new tab) (J Neurochem 2006;97(2):303-309; DOI 10.1111/j.1471-4159.2006.03693.x; PMID 16539679)

Related Clinical Trials

• Plasma Trimethylamine N-oxide Elevation Induced by L-carnitine Supplementation and Insulin ResistanceN/A · Completed

Related News & Research

• FDA Advisory Panel Recommends Six of Seven Peptides for Compounding, Rejects EmideltideNews · Jul 25, 2026
• FDA Advisory Panel Votes to Recommend Compounding of BPC-157, TB-500 and Four Other Peptides, Rejects EmideltideNews · Jul 24, 2026
• FDA Scientists Question Evidence for Peptides Backed by RFK Jr. Ahead of Advisory PanelNews · Jul 1, 2026

Common Questions

What is DSIP?

DSIP (delta sleep-inducing peptide) is a naturally occurring nine-amino-acid peptide, first isolated in 1977, that was named for its ability to promote delta-wave (deep) sleep in early animal experiments. Its reported effects on sleep and stress have been inconsistent, it has no approved therapeutic use, and the evidence base is limited and dated.

Is DSIP approved for medical use?

DSIP is investigational: it is being studied in clinical research and is not an approved medicine. United States (FDA): Not FDA-approved; an experimental peptide with no approved therapeutic use. On July 24, 2026, the FDA Pharmacy Compounding Advisory Committee voted 6-7, with one abstention, against recommending emideltide, the delta sleep-inducing peptide nominated under the DSIP name, for the Section 503A Bulk Drug Substances List, citing insufficient safety and efficacy data for insomnia, narcolepsy and opioid use disorder; it was the only one of seven nominated peptides not recommended. European Union (EMA): No EMA marketing authorisation; not an approved medicine in the EU. Australia (TGA): Not on the ARTG; an unapproved experimental substance.

How does DSIP work?

In plain terms, DSIP was discovered as a blood-borne factor that seemed to encourage deep sleep, but exactly how it works remains uncertain. Technically, it is a small amphiphilic nonapeptide (Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu) that can cross the blood-brain barrier and has been reported to influence neurotransmitter and neuroendocrine systems (including effects on corticotropin and other hormones) and circadian regulation.

Is DSIP legal in Australia?

DSIP in Australia (TGA): Not on the ARTG; an unapproved experimental substance.

Is DSIP banned in sport?

DSIP under the World Anti-Doping Agency (WADA) code: Not listed by name on the Prohibited List; as a non-approved substance, athletes should verify current status with their anti-doping organisation.