Melatonin and sleep: how does the sleep hormone work?

Introduction

Sleep does not depend solely on fatigue.

It is regulated by an essential hormone called melatonin.
This hormone acts as an internal biological clock that tells the body when it's time to sleep.

When melatonin is released at the right time, falling asleep becomes more natural and sleep deeper.

But today, many modern habits disrupt this production.

What is melatonin?

Melatonin is a hormone produced by a small gland located in the brain called the pineal gland.

Its main function is to regulate:

• the sleep-wake cycle

• falling asleep

• the circadian rhythm

Melatonin production naturally increases in the evening as light decreases.

The body then understands that night is approaching and gradually prepares for rest.

Why melatonin is essential for falling asleep

When melatonin is released, several mechanisms are activated:

• the brain slows its activity

• body temperature decreases slightly

• the body gradually relaxes

These changes promote the onset of sleep.

This is why specialists recommend maintaining a regular evening routine.

👉 Read also: how to improve your sleep naturally

Why melatonin production can be disrupted

Today, several factors can reduce or delay the natural production of melatonin.

The most frequent are:

• exposure to screens in the evening

• stress

• irregular sleep schedules

• too much light before sleeping

When these elements disrupt the natural cycle, the brain may have more difficulty transitioning into rest mode.

This phenomenon explains why some people find it difficult to fall asleep quickly.

👉 Discover also: how to fall asleep quickly at night

The role of light in the sleep cycle

Light plays a decisive role in regulating melatonin.

When light diminishes in the evening, the brain receives the signal that it is time to produce this hormone.

Conversely, intense artificial light can send an opposing signal.

This is why many people feel that their brain remains active in the evening.

👉 Read also: why the brain can no longer disconnect in the evening 

Promoting natural sleep

To support the natural production of melatonin, several habits can help:

• reduce screen time before sleeping

• maintain regular hours

• create a calming evening routine

• sleep in a quiet environment

In some cases, certain individuals also choose to complement their evening routine with solutions designed to facilitate the transition to sleep.

👉 Discover: sleep strips to fall asleep more easily

FAQ

Is melatonin the sleep hormone?

Yes. Melatonin is the hormone that regulates the sleep-wake cycle and tells the body when it's time to sleep.

Why do some people produce less melatonin?

Stress, screens, artificial light, and irregular schedules can disrupt the natural production of melatonin.

How to naturally stimulate melatonin?

Maintaining an evening routine, reducing light in the evening, and fostering a calm environment can help the body produce this hormone naturally.