3 Questions
Which substance is the world's most widely used psychoactive substance?
Caffeine
What does caffeine do to the central nervous system?
It stimulates it
What is the safe daily consumption of caffeine for an adult?
Up to 400 milligrams
Study Notes
- Caffeine is the world's most widely used psychoactive substance.
- It stimulates the central nervous system by blocking adenosine molecules.
- Caffeine occurs naturally in coffee, tea, cacao beans, and some tree nuts.
- Daily consumption of caffeine took off sporadically at different times in different places around the world.
- Nearly 90% of the US population has at least one caffeinated beverage every day.
- Up to 400 milligrams of caffeine per day is considered safe for an adult.
- Too much caffeine can cause side effects such as migraines, insomnia, nervousness, and muscle tremors.
- One tablespoon of pure caffeine is equivalent to drinking 75 cups of coffee and can be lethal.
- The FDA banned the bulk sale of products containing pure or highly concentrated caffeine in 2018.
- Caffeine provides benefits such as increased focus, alertness, and energy, but also comes with considerable risks.
Explore the world's most widely used psychoactive substance - caffeine. Learn about its stimulating effects on the central nervous system, daily consumption safety limits, potential side effects, and the balance between benefits and risks. Discover where caffeine occurs naturally and why the FDA has regulated its sale.
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