Caffeine - Wikipedia Caffeine is a bitter, white crystalline purine, a methylxanthine alkaloid, and is chemically related to the adenine and guanine bases of deoxyribonucleic acid (DNA) and ribonucleic acid (RNA)
Caffeine: How much is too much? - Mayo Clinic Up to 400 milligrams (mg) of caffeine a day appears to be safe for most healthy adults That's roughly the amount of caffeine in four cups of brewed coffee, 10 cans of cola or two "energy shot" drinks Keep in mind that the actual caffeine content in beverages varies widely, especially among energy drinks
What Is Caffeine, and Is It Good or Bad for Health? Caffeine is a natural stimulant most commonly found in tea, coffee, and cacao plants It works by stimulating the brain and central nervous system, helping you stay alert and prevent the onset of
Caffeine: What It Is, Benefits and Side Effects Caffeine is one of the most commonly used stimulants in the world, increasing chemicals in your brain that excite or motivate your central nervous system
CAFFEINE - Uses, Side Effects, and More - 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 nervous
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 Read on to learn more about sources of caffeine, and a review of the research on this stimulant and health The chemical name for the bitter white powder known as caffeine is 1,3,7 trimethylxanthine Caffeine is absorbed within about 45 minutes after consuming, and peaks in the blood anywhere from 15 minutes to 2 hours [2]