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Delta Sleep-Inducing Peptide (DSIP) Product Description Delta sleep-inducing peptide (DSIP) is a natural neuropeptide consisting of nine amino acids that was first isolated from rabbits in the 1970s

This reduces fasting and postprandial blood glucose and reverses insulin resistance

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Senescent Leydig Cell Elimination & Testosterone Restoration in Aged Mice (Aging / PMC, 2020) FOXO4-DRI Disrupts FOXO4-p53 in Senescent Leydig Cells and Improves Testicular Microenvironment A study published in Aging (and indexed on PMC) demonstrated that FOXO4 is specifically expressed in human Leydig cells, with nuclear translocation of FOXO4 in elderly men correlating with decreased testosterone synthesis

However, men using testosterone gel may benefit from additional antioxidant support due to daily hormone fluctuations