Tier C · Early / limited human evidence
DSIP
An intriguing sleep peptide whose human literature is old, small and inconsistent.
Why researchers care
Potential human relevance
- Several small human studies reported changes in sleep duration or structure
- Some early insomnia studies described subjective improvement
- The peptide became a model for exploring endogenous sleep regulation
What the human evidence says
Evidence, not extrapolation
The human literature is mixed. Some studies reported improvement; another chronic-insomnia study concluded that short-term treatment was unlikely to have major therapeutic benefit.
How to think about it
The Yooper Peptides take
DSIP is a useful reminder that positive early studies can coexist with later disappointing results.
Primary / authoritative reading