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- Caffeine - Wikipedia
The most common sources of caffeine for human consumption are the tea leaves of the Camellia sinensis plant and the coffee bean, the seed of the Coffea plant Some people drink beverages containing caffeine to relieve or prevent drowsiness and to improve cognitive performance
- Caffeine: How much is too much? - Mayo Clinic
Up to 400 milligrams (mg) of caffeine a day seems safe for most adults That's about the amount of caffeine in four cups of brewed coffee, 10 cans of cola or two "energy shot" drinks Keep in mind that the caffeine content in drinks varies widely
- Caffeine: What It Is, Benefits and Side Effects
What is caffeine? Caffeine is a type of drug called a stimulant, meaning it increases chemicals in your brain called neurotransmitters
- Caffeine: Overview, Uses, Side Effects, Precautions . . . - WebMD
Caffeine is a natural chemical with stimulant effects It is found in coffee, tea, cola, cocoa, guarana, yerba mate, and over 60 other products Caffeine works by stimulating the central
- What Is Caffeine, and Is It Good or Bad for Health?
Caffeine is a natural stimulant consumed throughout the world This article reviews caffeine and its health effects, both good and bad
- Caffeine | Stimulant, Health Benefits, Addiction | Britannica
Learn about caffeine's effects on the human body Caffeine has a stimulating effect on the central nervous system, heart, blood vessels, and kidneys It also acts as a mild diuretic Caffeine’s potent stimulatory action makes it a valuable antidote to respiratory depression induced by drug overdose (e g , from morphine or barbiturates)
- Caffeine - The Nutrition Source
Although we tend to associate caffeine most often with coffee or tea, the research below focuses mainly on the health effects of caffeine itself Visit our features on coffee, tea, and energy drinks for more health information related to those beverages
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