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Bookmark or Share- What Is Caffeine? Is It Good for You? - Verywell HealthCaffeine is a chemical compound. It is considered a drug, though it is freely available and not regulated. Caffeine naturally occurs in many plants, including coffee and cocoa beans, and tea leaves. It is also used in over-the-counter (OTC) and prescription medications.
- Caffeine - WikipediaCaffeine. This article is about the stimulant drug. For other uses, see Caffeine (disambiguation). Caffeine is a central nervous system (CNS) stimulant of the methylxanthine class. [9] . It is mainly used as a eugeroic ( wakefulness promoter) or as a mild cognitive enhancer to increase alertness and attentional performance.
- Caffeine: How much is too much? - Mayo ClinicJust one teaspoon of powdered caffeine is equivalent to about 28 cups of coffee. Such high levels of caffeine can cause serious health problems and possibly death. Although caffeine use may be safe for adults, it's not a good idea for children.
- Natural Caffeine: Overview, Sources, and Types - HealthlineNatural caffeine is the type of caffeine that is naturally found in foods like coffee, tea, and chocolate. It works by blocking adenosine receptors in your brain. Adenosine is a neurotransmitter...
- The Nutrition Source - Harvard T.H. Chan School of Public HealthLearn more about coffee. Espresso. 1 shot or 1.5 ounces contains about 65 mg caffeine. Tea. 1 cup of black tea contains about 47 mg caffeine. Green tea contains about 28 mg. Decaffeinated tea contains 2 mg, and herbal tea contains none. Learn more about tea. Soda. A 12-ounce can of regular or diet dark cola contains about 40 mg caffeine.
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