Melatonin is a white-cream to yellowish crystalline powder. Melting point is 117°C. LogP value is 1.6. Melatonin has pKa of 16.51 and -0.69
Regular sleep routine is essential for good sleep quality and internal clock. Adults need at least seven hours of sleep regularly. Humans are creatures of habit that form sleep patterns through repetition
HGH is produced by pituitary gland and aids in cell repair and metabolism. Low HGH levels indicate poor health and increased disease risk. Optimal HGH levels support injury recovery and athletic performance
Our bodies have a biological clock that regulates sleep based on light changes. Melatonin production increases before midnight to signal sleep. Cross-time zone travel disrupts the natural sleep cycle
Deep sleep (N3) is the deepest stage of nightly sleep. Body naturally cycles through deep sleep 2-4 times per night. First deep sleep phase lasts almost an hour, last 15 minutes
Rumination about past events is a major cause of nighttime depression. Nighttime light exposure may interfere with sleep cycles. Circadian rhythm disruption increases depression risk. Chronotype (sleep patterns) affects depression risk. Loneliness can cause sadness at night