Melatoniinieritystä

Melatoniinieritystä refers to the secretion of melatonin, a hormone primarily produced by the pineal gland in the brain. Melatonin plays a crucial role in regulating the body's circadian rhythms, which are the natural sleep-wake cycles. Its production is influenced by light exposure; darkness stimulates melatonin release, signaling to the body that it is time to sleep. Conversely, light, particularly blue light, suppresses melatonin secretion, promoting wakefulness.

The level of melatonin in the blood typically rises in the evening, peaks in the middle of the night, and gradually declines towards morning. This hormonal fluctuation helps to synchronize the internal biological clock with the external environment, facilitating a consistent sleep pattern. Disruptions to this natural rhythm, such as those caused by shift work, jet lag, or excessive exposure to artificial light at night, can interfere with melatonin secretion and lead to sleep disturbances.

Melatonin is often referred to as the "sleep hormone" due to its significant impact on sleep onset and quality. While its primary function is related to sleep regulation, research also suggests that melatonin possesses antioxidant properties and may play a role in other physiological processes, although these aspects are less understood than its chronobiological effects. The study of melatoniinieritystä is an important area in understanding sleep disorders and developing strategies to improve sleep health.