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DSIP Also known as: Delta Sleep-Inducing Peptide, Delta Sleep Peptide Summary DSIP (delta sleep-inducing peptide) is a neuropeptide discovered in the 1970s during research on sleep-promoting factors in blood

Research in humans is a bit less impressive Clinical trials in humans A 1981 double-blind study found that chronic insomniac patients found that subjects slept 59% more, shorter sleep latency, and higher sleep efficiency (Schneider 1981) A 1987 double-blind study did not find any statistically significant changes in sleep structure as measured by REM sleep, NREM sleep, or total sleep time (Debellis 1987) A 1992 double-blind study in 14 chronic insomnia patients found higher sleep efficiency and subjectively estimated tiredness decreased to similar levels of healthy subjects in 7 nights of injections (Schneider 1992) There are some limitations to these studies however

On a bell curve, an increase that produces less effect is ambiguous: you cannot tell whether you are below the peak or past it

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