Melatonin

Definition

Melatonin is a hormone produced by the pineal gland in the brain. It plays a key role in regulating sleep-wake cycles, helping you feel drowsy at night and awake during the day. The production of melatonin increases when it gets dark and decreases with light, making it closely tied to your circadian rhythm.

Example

Imagine you’re watching a movie late at night on your phone. The blue light from the screen can trick your brain into thinking it’s still daytime, suppressing melatonin production. This makes it harder for you to fall asleep, which is why experts recommend avoiding screens before bedtime.

Why It Matters

Melatonin matters because sleep is essential for physical and mental health. When melatonin levels are balanced, you experience better quality sleep, which helps with memory, mood regulation, and overall energy levels. Disruptions in melatonin production can lead to insomnia or daytime fatigue, highlighting the importance of maintaining a healthy sleep-wake cycle. By understanding melatonin, you can make choices that support your natural rhythms and improve your well-being.

See Also

• Circadian Rhythm
• Suprachiasmatic Nucleus