Biosci Rep
This product should be added to a formulation at the recommended usage rate
Potassium Sorbate: Preserves freshness
DSIP, or Delta Sleep-Inducing Peptide, is a naturally occurring neuropeptide that has been studied for possible effects on sleep regulation, stress response, and neuroendocrine function
Li Q, Zhang H, Pan J, Teng B, Zeng Z, Chen Y
Its defining structural feature is the gamma-glutamyl linkage: the glutamate residue is joined through its side-chain carboxyl rather than the usual alpha-peptide bond, which makes the molecule resistant to most intracellular peptidases and means it is cleaved almost exclusively by gamma-glutamyl transpeptidase at the outer cell surface (Zhang, Forman and Choi, Methods in Enzymology, 2005)