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).

Jun 3, 2020 · 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 …

Feb 21, 2025 · 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 …

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 …

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...

Feb 6, 2025 · Experts say up to 400 milligrams (mg) of caffeine a day may be safe for most adults. But if you get headaches or are restless or nervous after having caffeine, you may want …

Feb 13, 2025 · 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 …

Sep 8, 2021 · What is caffeine? 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 …

Jan 2, 2025 · Caffeine is a naturally occurring central nervous system stimulant belonging to the methylxanthine class and is widely recognized as the most utilized psychoactive stimulant …

Sep 21, 2024 · Caffeine: A comprehensive guide to its facts and effects on your body and mind. Explore the benefits, risks, and how to use caffeine responsibly