Melatonin tells your body when its time to sleep, but too much screen time can lower its levels. Most people take before bed, but timing also matters! Taking it 1 2 hours before bedtime in Frontiers Pichia pastoris secreted peptides crossing the blood brain barrier and DSIP fusion peptide efficacy in PCPA induced insomnia mouse models Sleep Disorders Neupsy Key Melatonin vs. CBD: Sleep, Benefits, Downsides Do Melatonin Patches Work? What to Know Before You Stick One On DSIP (Delta Sleep Inducing Peptide) Full Rundown [2026]