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  1. en.wikipedia.org › wiki › CaffeineCaffeine - 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).

  2. Mar 19, 2022 · Caffeine has its perks, but it can pose problems too. Find out how much is too much and if you need to curb your consumption. 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.

  3. Apr 26, 2022 · Up to 400 milligrams of caffeine a day is considered safe for most adults. However, people's sensitivity to caffeine varies. If you're bothered by headaches, restlessness or anxiety, you may want to reevaluate your caffeine intake.

  4. 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 prevent the onset...

  5. Jul 24, 2023 · Caffeine is a stimulant that occurs naturally in some foods. The Food and Drug Administration (FDA) recommends a maximum intake of 400 mg a day, or two to three cups of coffee. A moderate intake...

  6. Overview. 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...

  7. May 9, 2023 · Knowing the symptoms of caffeine and its long-term effects on your body may make you think twice about having that fourth cup of coffee. Read on to learn more about these effects.

  8. Jul 11, 2024 · Caffeine has been widely studied for years for its potential health benefits. Research shows natural caffeine may improve alertness, thinking, and physical performance. This article discusses natural caffeine, including its health benefits, sources, effects on the body, comparisons to synthetic caffeine, and more.

  9. Caffeine is a mild stimulant to the central nervous system that quickly boosts our alertness and energy levels. Learn more about caffeine and health.

  10. Nov 1, 2022 · Here, you’ll learn the definition of caffeine, its pros and cons, how to get it, and how much to consume for optimal health. Each claim is medically reviewed and supported by science.

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