For laboratory and research use only. Not for human consumption.
FreePen Starter Kit+ free shipping over $200
Limitless Peptides
Cart
Home / Cognitive & Nootropic / DSIP
DSIP10 mg RUO

DSIP

Deeper slow-wave sleep with lower overnight cortisol.

  • Built for deep sleep, promotes slow-wave delta sleep and lowers overnight cortisol
  • Works on the stress axis (CRH), so nights read calmer, not just longer
  • Effects show up early, not after weeks of buildup
Studied for
Deep sleepOvernight cortisol
≥99% purity HPLC-tested Cognitive & Nootropic
Size
$59per vial

Free shipping over $200 · ships from the USA

Why researchers choose it

DSIP (Delta Sleep-Inducing Peptide) is a natural peptide studied for pushing sleep into its deepest, slow-wave stage. It works on the stress hormone CRH, with lower overnight cortisol and steadier circadian rhythm as the reported effects. The idea is genuinely interesting and the human evidence is still thin, and the source guide is honest about both.

Reconstitution reference concentration only, not dosing

Set the vial strength and how much bacteriostatic water you draw into it. This returns the resulting concentration for lab handling. It is a dilution reference, not a dosing recommendation.

mg / mL
Each 0.01 mL — one unit on a U-100 syringe — holds
Syringe drawVolumeAmount in that volume

Most compounds reconstitute with bacteriostatic water; a few acid-loving peptides use acetic acid instead. How much to draw, and how many vials a cycle needs, live in the Complete Peptide Guide, not here.

How much, and how many vials for a full cycle?

Protocol and cycle-length questions get answered in the Complete Peptide Guide, not here. These listings carry no dosing.

Read more →
This compound is supplied for laboratory research use only and is not for human or veterinary consumption. The research summarized here describes published third-party findings, not outcomes from Limitless Peptides, and is not dosing guidance or medical advice. These statements have not been evaluated by the Food and Drug Administration; this product is not intended to diagnose, treat, cure, or prevent any disease.

How to verify what you received

Every batch we list is third-party HPLC-tested to ≥99% purity. When your vial arrives, these are the handling and quality-control checks a researcher runs before use.

Commonly studied alongside

MELATONIN10 mg RUO

Melatonin(10 mg)

Deeper sleep and antioxidant defense, the body's night signal in a vial.

$45
EPITHALON50 mg RUO

Epithalon(50 mg)

The most-studied longevity peptide, a telomerase-activating bioregulator.

$99

More in Cognitive & Nootropic

View all →
SELANK10 mg RUO

Selank(10 mg)

Calm focus without the sedation, a Russian-approved anxiolytic peptide.

$59
SEMAX10 mg RUO

Semax(10 mg)

Sharper focus and memory, the Russian-approved nootropic neuropeptide.

$65

What the research reports 5 citations

  • Promotes slow-wave (delta) sleep and helps regulate circadian rhythm.PubMed: DSIP
  • Modulates CRH, with reduced overnight cortisol as the reported signal.PubMed: DSIP
  • Reported effects appear early rather than after weeks of buildup: deeper, more restorative sleep, plus vivid dreams in some subjects.Peptide Guide, expected effects
  • Straight talk: human data are minimal and no dosing RCT exists.Peptide Guide, evidence note
  • PCAC rejected it (as "emideltide") from the 503A bulks list 6 to 7 in July 2026, the only one of seven peptides voted down.PCAC vote, Jul 2026

Compound reference physicochemical facts

Class
Neuropeptide
Molecular formula
C35H48N10O15
Molecular weight
848.8 g/mol
CAS number
62568-57-4
Storage
Lyophilized −20 °C; reconstituted 2–8 °C, kept from light
DSIP$59