Skip navigation

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

Caffeine

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 colas
  • Cacao pods, which are used to make chocolate products

There is also synthetic (man-made) caffeine, which is added to some medicines, foods, and drinks. For example, some pain relievers, cold medicines, and over-the-counter medicines for alertness contain synthetic caffeine. So do energy drinks and "energy-boosting" gums and snacks.

(Read more)

Results 1 - 10 of 616 for Caffeine
  1. Caffeine (National Library of Medicine)  
    What is caffeine? Caffeine is a bitter substance that occurs naturally in more than 60 plants including: Coffee beans Tea leaves Kola nuts, ... chocolate products There is also synthetic (man-made) caffeine, which is added to some medicines, foods, and ...
  2. Caffeine is a substance that is found in certain plants. It can also be man-made and ... Caffeine is absorbed and passes quickly into the brain. It does not collect in the bloodstream or ...
  3. The combination of ergotamine and caffeine is used to prevent and treat migraine headaches. Ergotamine is in a class of medications called ergot alkaloids. It works together ...
  4. Caffeine is a substance that exists naturally in certain plants. It can also be man-made and ... is a diuretic, which means it increases urination. Caffeine overdose occurs when someone takes in more than ...
  5. Spilling the Beans: How Much Caffeine is Too Much? (Food and Drug Administration)  
    Caffeine/Start Here ... Caffeine ... Food and Drug Administration ... According to scientists at the FDA, caffeine can be part of a healthy diet for most people, but ...
  6. Caffeine (For Parents) (Nemours Foundation)  
    Child Nutrition/Specifics ... Child Nutrition ... Caffeine/Children ... Caffeine ... Nemours Foundation ... caffeine, too much caffeine, drinking too much caffeine, caffeinated ...
  7. The combination of aspirin, butalbital, and caffeine comes as a capsule and tablet to take by mouth. It usually is taken every 4 hours as needed. Follow the directions ...
  8. The combination of acetaminophen, Butalbital, Caffeine comes as a capsule and tablet to take by mouth. It usually is taken every 4 hours as needed. Follow the ...
  9. Alcohol and Caffeine (Centers for Disease Control and Prevention)  
    The CDC Caffeine and Alcohol fact sheet discusses the dangers, prevalence, and public health implications of mixing alcohol with caffeine or energy drinks.
  10. Caffeine and Migraine (American Migraine Foundation)  
    Caffeine is sometimes a helpful treatment for migraine, but is more often a risk factor. Learn the ...
previous · 1 · 2 · 3 · 4 · 5 · 6 · 7 · 8 · 9 · 10 · next