Your body makes melatonin through a series of biochemical steps that begin with the amino acid tryptophan. Tryptophan is converted to 5-HTP, then serotonin, N-acetylserotonin, and finally melatonin, mainly in the pineal gland. Your circadian clock and the light-dark cycle determine when this pathway becomes much more active, which is why melatonin normally rises at … Read more
Blue light can affect melatonin and sleep, particularly when you are exposed to bright light in the evening. Light entering your eyes sends signals to the circadian clock, which helps determine when melatonin should rise and fall. Blue wavelengths are especially effective at influencing this system, but brightness, timing, duration, and individual sensitivity also matter. … Read more
Melatonin may help reduce jet lag and make it easier to adjust to a new time zone, but the timing of use is crucial. It can provide the body with a biological-night signal and, when correctly timed, help shift the circadian clock toward the destination schedule. The best approach depends on travel direction, number of … Read more
Melatonin may help some shift workers sleep better during the day, especially after a night shift, but it is not a complete solution to shift-work sleep problems. The evidence suggests that timed melatonin can improve daytime sleep in some people, although the benefits appear modest and the certainty of the evidence is low. Timing, light … Read more
Circadian rhythm and melatonin are closely connected and work together to regulate sleep timing. Your circadian rhythm acts as the body’s internal clock, while melatonin signals that it is biological night. Light exposure helps set this clock and influences when melatonin rises and falls, helping your body know when it is time to sleep and … Read more