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If you have problems with your PC locking or going to sleep, caffeine will keep it awake. It works by simulating a keypress once every 59 seconds, so your machine thinks you're still working at the keyboard, so won't lock the screen or activate the screensaver.
Caffeine-containing drinks, such as coffee, tea, and cola, are consumed globally in high volumes. In 2020, almost 10 million tonnes of coffee beans were consumed globally. Caffeine is the world's most widely consumed psychoactive drug.
4 天前 · 咖啡因（英語： caffeine ）是一種黃嘌呤 生物鹼化合物。 咖啡因主要存在於 咖啡樹 、 茶樹 、 巴拉圭冬青 （瑪黛茶）及 瓜拿納 的果實及葉片裡，而 可可樹 、 可樂果 及 代茶冬青樹 也存在少量的咖啡因。
카페인(영어: caffeine)은 메틸크산틴 계열의 중추신경계(CNS) 각성제이다. 알칼로이드의 일종이다. 세계에서 가장 널리 사용되는 향정신성 약물(psychoactive drug)이다. 다른 많은 향정신성 물질과는 달리, 거의 모든 나라에서 합법적이며 규제가 없다.
2023年7月24日 · Caffeine is a stimulant and the most commonly used drug in the world. Benefits can include increased alertness, energy, and concentration. However, it can also lead to insomnia and headaches...
2022年3月19日 · Find out how much is too much and if you need to curb your consumption. By Mayo Clinic Staff. If you rely on caffeine to wake you up and keep you going, you aren't alone. Millions of people rely on caffeine every day to stay alert and improve concentration.
2023年5月18日 · Caffeine is a natural stimulant consumed throughout the world. This article reviews caffeine and its health effects, both good and bad.
2020年7月22日 · In many countries, a large majority of adults consume caffeine daily. This review summarizes the evidence about the varied physiological effects of caffeine and coffee and the risks of...
Caffeine is a mild stimulant to the central nervous system that quickly boosts our alertness and energy levels. Learn more about caffeine and health.
2021年9月8日 · Caffeine is a bitter substance that occurs naturally in more than 60 plants including: Coffee beans. Tea leaves. Kola nuts, which are used to flavor soft drink colas. Cacao pods, which are used to make chocolate products. There is also synthetic (man-made) caffeine, which is added to some medicines, foods, and drinks.
