Uses of a compound of formula (I), i.e., gallocatechin, are provided, comprising the use of the compound of formula (I) in ameliorating sleep disturbance, regulating appetite, regulating sleep, regulating mood, regulating vasoconstriction, regulating hemostatic function, regulating immune response, or manufacturing a pharmaceutical composition:. The pharmaceutical composition is useful in increasing the expression of melatonin and/or promoting the secretion of melatonin, or in at least one of treating diseases related to neurometabolic disorder, and preventing diseases related to neurometabolic disorder.式（I）化合物（即，沒食子兒茶素）之應用，包括使用該式（I）化合物於改善睡眠困擾、調節食慾、調節睡眠、調節情緒、調節血管收縮、調節止血功能、免疫調節、或製造一醫藥組合物：。該醫藥組合物可用以提升褪黑激素表現及／或促進褪黑激素分泌，或用於以下之至少一者：治療神經代謝紊亂相關疾病、及預防神經代謝紊亂相關疾病。
