What Is DSIP?
DSIP stands for delta sleep-inducing peptide. It was discovered in the 1970s when researchers isolated it from the blood of sleeping rabbits and found it appeared to promote deep, slow-wave ("delta") sleep when given to other animals.
Today, it's marketed online as a peptide for deeper, more restful sleep.
What Does the Research Show?
Research on DSIP has been mixed for decades:
- Early animal studies suggested it promoted deep sleep
- Small human studies in the 1980s produced inconsistent results—some showed modest improvements in sleep, while others showed no meaningful effect compared with placebo
- Its mechanism remains unclear. Scientists still haven't identified a specific receptor or gene for DSIP
- There are no modern, large, well-designed clinical trials confirming its benefits
Because many older studies were small and not always well controlled, it's difficult to separate any real effect from a placebo effect.
Regulatory Status
DSIP is not FDA-approved. In July 2026, an FDA advisory committee voted against recommending it for compounding, and it was not included in HHS's October 2026 interim compounding policy for certain peptides. Peptide regulations have changed several times in 2026, so a provider can help you understand current rules.
Is It Safe?
Human safety data is limited and outdated. Products sold online are unregulated and may contain impurities or incorrect doses.
Proven Ways to Improve Sleep
- Consistent schedule: Go to bed and wake up at the same time every day
- Cool, dark, quiet bedroom
- Limit caffeine after early afternoon and avoid alcohol close to bedtime
- Morning light exposure to support your body clock
- Regular exercise
- CBT for insomnia (CBT-I): The first-line treatment for chronic insomnia
- Screen for sleep apnea if you snore or feel tired despite enough sleep
- Address hormonal factors like menopause symptoms or low testosterone
If you're struggling with sleep, talk with a provider: Talk to a Heva Specialist
The Bottom Line
DSIP has been studied since the 1970s, but results in humans are inconsistent and it's hard to rule out a placebo effect. Proven sleep strategies are a far more reliable path to better rest.