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Frontiers in Bioengineering and Biotechnology 10:893936

USA 86 , 84278431 (1989)

DSIP is a neuropeptide that occurs naturally in the brain and other tissues

The FDA does not require pre-approval for cosmetic ingredients, which is why thousands of serums, creams, and prescription formulations contain it without regulatory issue

This may aid in the formation of tighter and smoother skin

The peptide's primary function may not ultimately be sleep at all, although it is most closely associated with sleep cycle regulation, because DSIP levels are the same in CNS tissues as in peripheral tissues, suggesting that the peptide may also be formed outside the CNS