Delta Sleep Inducing Peptide (DSIP)
The peptide discovered in the brains of sleeping rabbits that directly promotes deep sleep.
Where It Came From
Delta Sleep Inducing Peptide (DSIP) was discovered when researchers examined the cerebrospinal fluid of rabbits during deep sleep. They found a molecule that appeared to be the brain's own signal for entering delta sleep (also called slow-wave sleep). This is the deepest, most restorative sleep phase where physical recovery happens.
What DSIP Does
DSIP creates biological pressure for delta sleep. It signals your brain to enter and maintain deep sleep. Additionally, DSIP lowers ACTH (adrenocorticotropic hormone)—the signal your pituitary sends to your adrenals to make cortisol. Multiple trials show significant reductions in ACTH and cortisol in stressed subjects using DSIP. It also stimulates superoxide dismutase (SOD), one of your primary antioxidant enzymes, adding a neuroprotective layer on top of the sleep benefit.
Real-World Effects
In human trials, DSIP improved deep sleep duration and reduced cortisol spikes in chronically stressed individuals. People report better sleep quality and feeling more rested. However, effects are variable—not everyone responds the same way. This is why medical supervision is recommended if you're considering it.
Best For
DSIP is best for: people with chronic stress and waking at 3am due to cortisol spikes, those who struggle to reach or maintain deep sleep, individuals with elevated nighttime cortisol who don't respond well to supplements alone.
Important Considerations
DSIP is not FDA-approved and availability is limited. Effects can be inconsistent. If you're interested, work with a knowledgeable healthcare provider. Do not self-experiment without professional guidance.
Disclaimer: Educational only. Not medical advice. Consult a doctor before use.