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科學實證!早晨喝咖啡 不僅提神醒腦還能點亮好心情

鏡週刊
2025/08/25 | 2分鐘閱讀

不少人早上醒來,腦袋昏昏沉沉的,會選擇用一杯咖啡作為開機儀式,這種「沒有咖啡,靈魂根本還在睡」的感覺,現在真的有科學的研究給出了答案,早晨的咖啡,不僅能提神,還可以提振心情。

不少人好奇咖啡讓人比較快樂究竟是不是心理作用,台北榮總婦女醫學部遺傳優生學科主任張家銘今於臉書分享, 2025年一篇刊登在《Scientific Reports》的研究給出了答案,咖啡或茶能明顯提升正向情緒,讓人覺得更開心、更有活力、更滿足。而效果最強的時間,就落在起床後2個半小時內,正好是大多數人飲用早上第一杯咖啡的時候。換句話說,早晨的咖啡,不只提神,還真的能幫忙把心情「點亮」。

為什麼早晨這杯咖啡特別有效?研究推測,一方面是因為一夜沒攝入咖啡因,早上那杯剛好「補充能量」,另一方面,喝咖啡的習慣與期待本身就足以讓人覺得更開心,再加上,咖啡因會阻斷腺苷受體,刺激多巴胺和正腎上腺素的釋放,能和生理時鐘互動,就像替身體按下「切換到白天模式」的按鈕。有趣的是,如果喝咖啡時有人陪你聊天,咖啡的加分效果反而會減弱,因為人際互動本身就是天然的快樂來源。

研究也提醒,咖啡對「壞心情」的改善並不穩定,有人喝了覺得沮喪減少但也有人沒什麼差別。所以咖啡比較像是將心情往正向推動的助力,並不是解決憂鬱或焦慮的藥方,真的想要穩定情緒,還是要靠睡眠、運動、人際互動,必要時還需要專業協助。

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