DSIP

DSIP (Delta Sleep-Inducing Peptide) is a naturally occurring peptide first identified in the 1970s and studied for its potential involvement in sleep regulation. It consists of nine amino acids and has been investigated for interactions with neuroendocrine signaling pathways.

In research settings, DSIP has been explored for its possible influence on sleep architecture, stress response modulation, and hormone regulation, including effects on growth hormone and cortisol dynamics. Findings have been mixed, and its precise physiological role remains not fully defined.