DSIP

Also known as Delta sleep-inducing peptide

A peptide discovered in the 1970s and named "delta sleep-inducing peptide" — but its effect on sleep is unclear.

Quick facts

Status: Not an approved medicine
Evidence: Limited (small, inconsistent human studies)
Taken as: Injection
Common sizes: 5 mg, 10 mg
Category: Sleep peptide (experimental)

How it works

Scientists still don't know exactly what it does in the body.

What people use it for

Sleep (claimed)
Stress

What the research shows

Small human studies with inconsistent results.

Side effects & risks

Headache and nausea
Daytime sleepiness

Is it legal?

Not an approved medicine in the EU, UK or US. In most countries it is illegal to sell it for use in people. Products labelled "research use only" are not checked for quality or purity.

Storage & safe handling

Mix with bacteriostatic water: let it run slowly down the inside of the vial and swirl gently — never shake.
Store the mixed vial in the fridge and follow the use-by period on the label.
Wipe the vial top with alcohol and use a new sterile needle and syringe every time.
Rotate injection sites so the same spot is not used again and again.
Put used needles in a sharps container, not the household bin.
Get medical help for redness that spreads, fever, swelling or trouble breathing.

Open in PepTimerTrack your protocol, calculate how much to draw and get reminders — free.Open in PepTimer

Sources: Schoenenberger GA, Monnier M, original isolation of DSIP (1977); later small clinical studies.
Last updated 12 October 2026. Information — not medical advice. PepTimer does not replace a doctor. Many peptides are not approved medicines in the EU, UK or US. Talk to a qualified healthcare provider before starting, changing or stopping any treatment.