Most sleep aids work by sedating you. DSIP is studied along a different line — sleep architecture, meaning the structure and staging of sleep rather than simply the amount of it. Delta sleep, also called slow-wave sleep, is the deepest stage and the one most associated with physical restoration, growth hormone release, and waking up genuinely recovered. It is also the stage most readily disrupted by stress, alcohol, and age. DSIP is a naturally occurring nonapeptide first isolated from research into that stage specifically. Dosing is as-needed in the evening rather than on a fixed cycle.