Seasonal affective disorder (SAD)is caused by hypersecretion of melatonin and shows itself as depression.

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Quizplus · Accepted Answer

Seasonal affective disorder (SAD) is indeed caused by hypersecretion of melatonin, which is a hormone that regulates sleep-wake cycles and is produced by the pineal gland. SAD is a type of depression that typically occurs during fall and winter months when daylight hours are shorter, leading to increased melatonin levels and disrupted circadian rhythms. Light therapy is often used as a treatment for SAD to regulate melatonin production and improve mood.

Seasonal Affective Disorder (SAD)is Caused by Hypersecretion of Melatonin and Shows