DSIP (delta sleep-inducing peptide) is a naturally occurring nonapeptide — Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu — studied as a neuromodulatory peptide across sleep-regulation and slow-wave-EEG research literature. Elite AU Peptides supplies it strictly for in-vitro and laboratory research use only — not for human or animal consumption, not a therapeutic good, and not TGA-approved. No sleep-aid or human-use claim is made about it.

What research is DSIP associated with?

DSIP was originally isolated from cerebral venous blood and characterised as a delta-EEG-inducing factor by Schoenenberger and Monnier (Proceedings of the National Academy of Sciences, 1977); its nonapeptide sequence was determined and confirmed by synthesis by Schoenenberger and colleagues (Pflügers Archiv, 1978). Its broader neuromodulatory research profile is surveyed by Graf and Kastin (Neuroscience & Biobehavioral Reviews, 1984). It is studied in vitro as a research tool, not as a treatment.

Does DSIP act on a single receptor?

No — DSIP is characterised in the literature as a diffusible neuropeptide modulator rather than a ligand with a single well-defined cloned receptor. That is why it is studied as a broad neuromodulatory research probe (its defining readout is enhancement of slow-wave / delta EEG activity in animal models) rather than a selective receptor agonist.

Why is DSIP a winnable term to research well?

DSIP sits in a low-competition corner of the research literature relative to its search interest, which is why a genuinely detailed, correctly-framed reference is useful. This guide focuses on the compound's identity, the primary literature, and handling — the research facts, not any human-use framing.

How is research-grade DSIP tested?

Every batch of DSIP is independently HPLC-tested by Janoshik Analytical before it is listed. The measured purity is published on the product page and in the lab-reports library — a real batch number, the measured percentage, and an independently verifiable Janoshik report; nothing is listed without a certificate on file.

How is DSIP shipped in Australia?

Stock is held and dispatched AU-domestic — no inbound customs handling. Free shipping over $100; orders placed before 12pm AEST are dispatched the same business day. Supplied strictly for laboratory research use only.

[ Neuromodulation research ]

DSIP in Australia: a delta-sleep-inducing-peptide research guide

What DSIP (delta sleep-inducing peptide) is — an amphiphilic nonapeptide referenced across slow-wave-EEG and neuromodulation research — where it sits in the literature, and how research-grade material is HPLC-verified. A laboratory research reference for Australian researchers.

7 min read · Updated 22 July 2026

DSIP (delta sleep-inducing peptide) research vial — 5mg / 10mg, independently HPLC-tested, COA on file

[ Research use only · Not for human consumption ]

DSIP in Australia. DSIP (delta sleep-inducing peptide) is a naturally occurring nonapeptide — Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu — studied as a neuromodulatory peptide across sleep-regulation and slow-wave-EEG research literature. This guide is a research-reference summary for Australian researchers: what the compound is, where it sits in the literature, and how research-grade material is verified. It makes no sleep-aid, medical, or human-use claim.

What DSIP is

DSIP is an amphiphilic nonapeptide — a hydrophobic tryptophan alongside polar and acidic residues — a structural feature noted throughout the handling and analytical literature and the basis of its water solubility. It was originally isolated from cerebral venous blood and characterised as a delta-electroencephalogram-inducing factor by Schoenenberger and Monnier (Proceedings of the National Academy of Sciences, 1977); its nonapeptide sequence was determined and confirmed by synthesis in the follow-up work of Schoenenberger and colleagues (Pflügers Archiv, 1978).

Where DSIP sits in neuromodulation research

In neuromodulation research, DSIP’s defining readout is enhancement of slow-wave (delta) and spindle EEG activity in animal models, positioning it as a probe of endogenous sleep-EEG and circadian modulation. The review literature — foundationally Graf and Kastin (Neuroscience & Biobehavioral Reviews, 1984) — also documents effects on neurotransmitter systems, hormone release, and stress and circadian pathways, which is why DSIP is described as a broad rather than a narrow research profile.

A diffusible modulator, not a single-receptor ligand

DSIP is characterised in the literature as a diffusible neuropeptide modulator rather than a ligand with a single well-defined cloned receptor. That is why it is studied as a general neuromodulatory research tool rather than a selective receptor agonist — a distinction that matters when designing a research protocol around it. It remains a reference peptide in sleep-EEG and neuroendocrine research contexts.

Identity, purity and the COA moat

Every batch of DSIP supplied by Elite AU Peptides is independently HPLC-tested by Janoshik before it is listed. The measured purity is published on the DSIP product page and in the lab-reports library — real batch number, measured percentage, independently verifiable at janoshik.com. DSIP is stocked in 5mg and 10mg lyophilised vials; nothing is listed without a certificate on file. In the nootropic category it sits alongside Semax and Selank.

Reconstitution and handling for research use

DSIP ships as a lyophilised powder. Being amphiphilic and water-soluble, it reconstitutes readily with bacteriostatic water — for example, a 5mg vial in 2mL yields a 2.5mg/mL working stock. Store the lyophilised powder at −20°C protected from light; once reconstituted, refrigerate at 2–8°C and use within the documented research window.

Compliance and research-use framing

DSIP is not TGA-approved and is not a therapeutic good. Elite AU Peptides supplies it strictly for in-vitro and laboratory research use only — not for human or animal consumption. We make no medical, sleep-aid, or human-use claim; the material above summarises the published neuromodulation literature for reference only. Researchers should consult primary peer-reviewed sources for protocol-specific reference values.

[ Frequently asked ]

Neuromodulation research — questions researchers ask.

What is DSIP?: DSIP (delta sleep-inducing peptide) is a naturally occurring nonapeptide — Trp-Ala-Gly-Gly-Asp-Ala-Ser-Gly-Glu — studied as a neuromodulatory peptide across sleep-regulation and slow-wave-EEG research literature. Elite AU Peptides supplies it strictly for in-vitro and laboratory research use only — not for human or animal consumption, not a therapeutic good, and not TGA-approved. No sleep-aid or human-use claim is made about it.
What research is DSIP associated with?: DSIP was originally isolated from cerebral venous blood and characterised as a delta-EEG-inducing factor by Schoenenberger and Monnier (Proceedings of the National Academy of Sciences, 1977); its nonapeptide sequence was determined and confirmed by synthesis by Schoenenberger and colleagues (Pflügers Archiv, 1978). Its broader neuromodulatory research profile is surveyed by Graf and Kastin (Neuroscience & Biobehavioral Reviews, 1984). It is studied in vitro as a research tool, not as a treatment.
Does DSIP act on a single receptor?: No — DSIP is characterised in the literature as a diffusible neuropeptide modulator rather than a ligand with a single well-defined cloned receptor. That is why it is studied as a broad neuromodulatory research probe (its defining readout is enhancement of slow-wave / delta EEG activity in animal models) rather than a selective receptor agonist.
Why is DSIP a winnable term to research well?: DSIP sits in a low-competition corner of the research literature relative to its search interest, which is why a genuinely detailed, correctly-framed reference is useful. This guide focuses on the compound's identity, the primary literature, and handling — the research facts, not any human-use framing.
How is research-grade DSIP tested?: Every batch of DSIP is independently HPLC-tested by Janoshik Analytical before it is listed. The measured purity is published on the product page and in the lab-reports library — a real batch number, the measured percentage, and an independently verifiable Janoshik report; nothing is listed without a certificate on file.
How is DSIP reconstituted and stored for research use?: The lyophilised vial is reconstituted with bacteriostatic water for laboratory handling — for example, a 5mg vial in 2mL yields a 2.5mg/mL working stock. Store the lyophilised powder at −20°C protected from light; once reconstituted, refrigerate at 2–8°C and use within the documented research window.
How is DSIP shipped in Australia?: Stock is held and dispatched AU-domestic — no inbound customs handling. Free shipping over $100; orders placed before 12pm AEST are dispatched the same business day. Supplied strictly for laboratory research use only.

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Elite AU Peptides supplies research peptides and related compounds for laboratory and in-vitro research use only. Products are not therapeutic goods, are not TGA-approved, and are not for human or animal consumption. Nothing on this site constitutes medical advice or a therapeutic claim. Purchasers must be 18 years or older and are responsible for complying with all applicable laws in their jurisdiction.