Have you heard of DSIP? In this study, delta sleep induced peptide was given to only 17 participants! But it helped improve their sleep markers.. unfortunately only 17 patients used but they were Role of Melatonin in the Management of Sleep and Circadian Disorders in the Context of Psychiatric Illness Current Psychiatry Reports Springer Nature Link Sleepwake therapy gives new hope for teens with depression Bovine Milk Casein Derived Sleep Enhancing Peptides: Bioavailability, Functional Mechanisms, and Development Strategies Journal of Agricultural and Food Chemistry Melatonin and Sleep Gateway Psychiatric Shift Right: Assessing Sleep Disorders and Associated Health Concerns Based on Salivary Melatonin and Dim Light Melatonin Onset (DLMO) Biology of Sleep