DSIP
Delta Sleep-Inducing Peptide, a nine-amino-acid neuropeptide first isolated from the blood of sleeping rabbits and named for its ability to promote delta-wave (deep) sleep. Despite the name, human evidence that it reliably improves sleep is weak and inconsistent, and it is sold only as a research chemical with no modern clinical validation.
01 Overview
DSIP is a naturally occurring neuropeptide identified in the 1970s from cerebral venous blood of rabbits in delta sleep. It has been investigated for sleep promotion, stress and pain modulation, and effects on hormone secretion, and crosses the blood-brain barrier. The name led to strong marketing for insomnia, but experimental results on sleep have been mixed and often failed to show a clear, reproducible hypnotic effect in humans.
Honest summary: the compound is real and biologically active in animal studies, but its human sleep benefit is not established, its endogenous role is still debated, and there is essentially no modern controlled human trial supporting the sleep-aid marketing. Consumers use it anecdotally for sleep and stress; dosing is convention-based and safety over time is unstudied.
02 Mechanism
A neuropeptide that crosses the blood-brain barrier and appears to modulate neurotransmission and neuroendocrine output; the exact receptor and the mechanism by which it might influence sleep architecture remain poorly defined.
03 Dosing
| Tier | Dose | Route | Notes |
|---|---|---|---|
| Anecdotal | 100–300 mcg/day | SubQ | Common self-reported dose taken before bed. No clinical basis; efficacy unproven. |
04 Effects
| Effect | Magnitude | Evidence | |
|---|---|---|---|
| Improved deep sleepThe headline claim; human sleep studies are mixed and a reliable hypnotic effect is not established. | Unconfirmed | ||
| Stress and pain modulationAnti-stress and analgesic effects reported mainly in animal models. | Preclinical |
05 Side effects
| Effect | Severity | Frequency | Evidence | Countermeasures |
|---|---|---|---|---|
| Injection-site reactionsLocal irritation at the injection site. | Mild | Common | Anecdotal | |
| Unknown long-term safetyNo modern human safety or toxicology data; effects on neuroendocrine axes are poorly characterised. | Moderate | Unquantified | Unconfirmed |