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Melatonin is secreted by a tissue called the "pineal gland" in the brain, and its main role is to help the body maintain sleep-wake rhythms (also called circadian rhythms).
READ MOREMelatonin is a hormone that tells the body it's time to sleep. In people without sleep problems, the body follows a roughly 24-hour biological clock called the circadian rhythm.
READ MOREVitamin C is one of the important vitamins to maintain human health. Because vitamin C is a water-soluble vitamin, it cannot be stored in the body. Therefore, everyone should supplement enough vitamin C every day.
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