DSIP — Delta Sleep-Inducing Peptide.
DSIP is a naturally occurring nonapeptide first isolated from the cerebral venous blood of sleeping rabbits in 1977. Despite its name, its effects on sleep in research have been more nuanced than the name implies.
What is DSIP?
DSIP (Delta Sleep-Inducing Peptide) is a nine-amino-acid peptide that crosses the blood-brain barrier. It was named for its association with delta-wave (deep) sleep, though its actual mechanism remains poorly understood. Research interest spans sleep regulation, stress resilience, and modulation of various neuroendocrine systems.
What does the research show?
What to look for when buying in Europe
One of the most affordable peptides on PeptideCompare. As a short stable peptide, purity should be high — require ≥98% HPLC and a batch-matched COA.
Molecular information
Pharmacokinetics
Compare DSIP across EU suppliers
11 EU vendors · COA-verified · from €18.85 · Updated monthly
Frequently asked questions
What is DSIP? ▾
DSIP (Delta Sleep-Inducing Peptide) is a nine-amino-acid peptide that crosses the blood-brain barrier. It was named for its association with delta-wave (deep) sleep, though its actual mechanism remains poorly understood.
What does the research show? ▾
The evidence is limited across the board: sleep-architecture studies show mixed results, animal data suggest stress-buffering and cortisol modulation, and pain and antioxidant signals are preliminary and inconsistent.
Does DSIP actually improve sleep? ▾
Results are mixed. Some studies show improved sleep onset and quality while others find minimal effect, and the mechanism is unclear.
Why is DSIP still poorly understood? ▾
Despite decades since its 1977 discovery, its mechanism remains unclear and the evidence base is limited and inconsistent.
Does DSIP affect stress and cortisol? ▾
Animal data suggest stress-buffering and cortisol-modulating effects, but this remains preliminary and unconfirmed in humans.
Is DSIP legal in the EU? ▾
It is sold as a research compound for laboratory use only.