DSIP
A nine-amino-acid peptide first isolated from sleeping rabbits, named for the delta (slow-wave) brain activity it seemed to trigger. People run it before bed for deeper sleep, easier sleep onset, and to take the edge off stress, usually a small subcutaneous shot 30 to 60 minutes before lights out.
Where to buy DSIP, cheapest first.
Prices from 6 vendors across the market. We link straight to each vendor’s product page and grade vendors on public lab data, so you’re not just chasing the lowest number.
DSIP
What DSIP actually does.
The simple version first, then a little more for the curious. No biochem degree required.
It nudges the brain toward deeper, slow-wave sleep, the heavy delta-stage rest that bodies do most of their repair in, rather than knocking you out the way a sedative does.
How it works
DSIP is a small signaling peptide. The exact pathway is still not pinned down, but across studies it is linked to a higher proportion of slow-wave (delta) sleep on EEG recordings. It does not appear to act directly on GABA-A receptors the way benzodiazepines do, which is part of why it is framed as a modulator rather than a sedative.
Where it acts
It is thought to act centrally, in the brain, helping regulate sleep architecture and the stress response. Animal work also points to reduced stress-hormone output and some antioxidant activity, so people associate it with calmer, more restorative rest rather than heavy grogginess.
What people notice
Reports tend to be subtle: falling asleep a little easier, deeper or less broken sleep, and sometimes more vivid dreams. It is not a switch that knocks you out. Effects are described as gentle and night-to-night variable.
Honest caveat: DSIP has been studied since the 1970s, but the human evidence is thin and genuinely mixed. Some studies show a slow-wave sleep effect, others show none, and the mechanism is still called an unresolved riddle in the literature. It is not an approved medicine and is sold strictly for research use only. None of this is medical advice, talk to a licensed provider before starting anything.
How to take it.
DSIP is an injection, given subcutaneously into fat with a tiny insulin needle, typically 30 to 60 minutes before bed. An intranasal spray form also exists and is sometimes used, but the subcutaneous shot is the most common and best-characterized route. The routine is below; for cycling and timing, see the full guide.
Reconstitute the vial
Add bacteriostatic water down the side of the vial (a 5mg vial + 2mL = 2.5mg/mL). Let it dissolve. Swirl gently, don't shake.
Draw your dose
On a U-100 insulin syringe, pull to your unit mark. 100mcg at 2.5mg/mL is 4 units (0.04mL). Use the calculator if you're unsure, the doses here are small.
Pinch and inject before bed
Swab with alcohol, pinch a bit of belly fat, insert at 45–90°, push slowly. Time it 30 to 60 minutes before you want to sleep, since the peptide is short-acting.
Rotate your sites
Move to a different spot each time so no area gets sore or lumpy. Store the vial in the fridge between doses.
The easiest spots are the belly (about 2 inches either side of the navel), the love handles, the front of the thigh, and the back of the upper arms. Rotate every injection.
Don't do the math, let the calculator do it.
This is DSIP's typical setup, already worked out. Change any value and the draw updates instantly.
Typical DSIP dose: about 100–300 mcg subcutaneously, 30 to 60 minutes before bed. People run it in short blocks of a few days to a few weeks rather than continuously, often a 5 to 10 day stretch around poor sleep.
How to cycle DSIP.
How long people run DSIP, when to take a break, and the honest reasoning behind it.
Used in short stretches, not continuously.
A cycle just means a defined run of time on the peptide, followed by a break. For DSIP the common pattern is a short block, a few days to a few weeks around poor sleep, rather than running it every single night forever.
Why not just run it forever? Mostly because the long-term human safety data does not exist, and because sleep aids in general are better used to reset a rough patch than relied on permanently. The cautious, widely followed approach is a focused block, then time off.
- Keep the timing tight, dosing 30 to 60 minutes before bed each night of a block, since the peptide is short-acting.
- Run short blocks, for example 5 to 10 nights or a two to four week cycle, rather than nightly indefinitely.
- Take a real break after a cycle before considering another. If sleep problems persist, that is a conversation for a licensed provider, not a forum.
Want the full picture, on and off periods, the washout, stacking, and keeping your results? Read how peptide cycling works →
What's actually in the vial.
For one of these vendors we link the per-batch certificate itself, and the purity below is read straight off it. The rest link to the vendor's general lab-results page. We don't run the labs ourselves and we don't show a purity number unless it's printed on a certificate we link, so you can open the document and check it against the batch yourself.
| Vendor | Purity (per COA) | Batch / report | Certificate |
|---|---|---|---|
| EZ Peptides | 98.383% | EZP-DSIP1003062026-02 | Janoshik report ↗ |
| Midwest Peptide | see lab page | not shown | Lab results ↗ |
| Next Gen Peptides | see lab page | not shown | Lab results ↗ |
| Penguin Peptides | see lab page | not shown | Lab results ↗ |
What people pair it with.
DSIP is usually run on its own or paired with simple sleep supports, not the heavy healing stacks. These are the combinations people reach for when better sleep is the goal.
Sleep & recovery
The low-friction pairing. DSIP for slow-wave depth, magnesium glycinate for relaxation and muscle calm. A gentle, common starting point that adds little risk of over-sedation.
View stack →Sleep onset
For nights when both timing and depth are off. Low-dose melatonin helps shift sleep onset while DSIP is run for delta-stage depth. Keep melatonin low to avoid morning grogginess.
View stack →Sleep & repair
A recovery-leaning pairing some people run in blocks. DSIP targets nightly sleep quality; Epitalon is run separately for its own circadian and longevity angle. Run cautiously and one variable at a time.
View stack →In the same corner.
Other sleep and recovery peptides people compare against DSIP.
Questions, answered straight.
Is DSIP legal?
DSIP isn't an approved drug, and it isn't sold for human use. The vendors we compare offer it strictly for research use only. It is not currently named on WADA's prohibited list, but any unapproved substance can fall under WADA's catch-all category, and contaminated peptides have caused failed tests before, so competing athletes should be careful. Rules vary by country, so check what applies where you are.
What does research use only actually mean?
It means the product is sold for laboratory and research purposes, not as a supplement or medicine for people. It hasn't been reviewed or approved for human use by the FDA. We aggregate prices and public lab data so you can see the landscape; what you do with that is between you and a licensed provider.
How do I store it?
Keep the sealed, freeze-dried vial cold, ideally in the freezer for long storage, and out of direct light. Once you mix it with bacteriostatic water, store it refrigerated and use it within two to three weeks. Don't freeze a reconstituted vial.
When should I dose it?
People typically inject DSIP 30 to 60 minutes before bed, since it is short-acting with a half-life measured in roughly 15 to 30 minutes. A common pattern is 100–300 mcg per night in short blocks. Use the calculator to turn your vial and dose into exact units, the amounts are small.
Does DSIP actually work for sleep?
Honestly, the evidence is mixed. DSIP has been studied since the 1970s and some studies show more slow-wave sleep while others show nothing, and the mechanism is still not fully understood. Treat it as something studied for sleep, not a proven sleep medicine, and talk to a licensed provider.