褪黑素 tuìhēisù melatonin Definitions Defs Origin Strokes Stroke Words Sentences Sents 褪黑素 tuìhēisù melatonin A hormone naturally produced by the body that regulates sleep-wake cycles, often used as a supplement.
褪黑素 tuìhēisù melatonin A hormone naturally produced by the body that regulates sleep-wake cycles, often used as a supplement.
