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best melatonin 5 mg

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  • Melatonin's introduction

    March 14, 2022

    Melatonin is a hormone synthesized by the pineal gland using tryptophan. Its most well-known function is to improve sleep. Melatonin secreted by pineal gland shows a strong physiological cycle law, which is related to the alternation of day and night. It secretes less during the day and more at night. One is people who need jet lag and shift work. Read More