As a result of darkness, the body releases melatonin, which regulates its sleep-wake cycle. It is naturally produced in the body. When it is dark, the body produces more melatonin, which can make you feel sleepy. Light, however, can help to increase alertness and wakefulness since melatonin production decreases.
The body's sleep-wake cycle may be regulated with melatonin supplements as a natural sleep aid. It's thought that they work by restoring the body's natural rhythm of melatonin production, which can get messed up by jet lag, shift work, and artificial light.
In spite of the fact that melatonin is generally considered safe for short-term use, long-term effects aren't clear. Also, it can interact with some medications and supplements, and it can cause headaches, dizziness, nausea, and sleepiness in some people. You should speak to a healthcare professional if you're considering taking melatonin.