Although melatonin is generally considered safe for short-term use, it is important to use it cautiously and consult a healthcare provider before taking supplements, especially for long-term use or in children. Taking too much melatonin can disrupt the body's natural rhythm and lead to unwanted side effects such as dizziness, headaches, or daytime sleepiness. While melatonin is most commonly associated with sleep, it also has other roles in the body.

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