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).

Mar 21, 2025 · Can’t get through the day without your morning cup of joe? Caffeine is one of the most commonly used stimulants in the world. But what is it, and what are its possible benefits …

May 18, 2023 · 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 …

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 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 …

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 …

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 …

Mar 19, 2025 · “Caffeine is a natural diuretic, a chemical that helps your body eliminate excess fluid,” Czerwony explains. But this effect may be lessened if you regularly consume caffeine, …

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 28, 2023 · Caffeine is a chemical that stimulates your central nervous system as well as your muscles, heart, and other parts of your body that help control blood pressure. The bitter …