Melatonin hormone, molecular model

Bildnummer 12920394
Melatonin hormone, molecular model
Melatonin hormone molecule. Computer model showing the structure of the hormone melatonin. Melatonin is secreted by the pineal gland in the brain and controls the body's biological rhythm. It is secreted at night and induces sleep. Pills containing melatonin can be taken to prevent jetlag. In middle age, melatonin secretion drops off and may be responsible for aging symptoms such as insomnia and irritability.
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Credit: Science Photo Library / Kon, Kateryna
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