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A cup of black tea typically has 40 to 50 milligrams of caffeine but can have as much as 90 milligrams. Green teas and white teas will have less caffeine. Green teas and white teas will have less ...
A standard cup of coffee can contain anywhere from 95 to 200 mg of caffeine. The FDA cites 400 mg of caffeine per day "as an amount not generally associated with dangerous, negative effects." But ...
A standard cup of coffee can contain anywhere from 95 to 200 mg of caffeine. That's a big range. The FDA cites 400 mg of caffeine per day "as an amount not generally associated with dangerous ...
The health effects of coffee include various possible health benefits and health risks. [1]A 2017 umbrella review of meta-analyses found that drinking coffee is generally safe within usual levels of intake and is more likely to improve health outcomes than to cause harm at doses of 3 or 4 cups of coffee daily.
Caffeine is considered one of the most widely consumed drugs around the world. Around 80% of the world population consumes caffeine in one form or another. [2] It is found in coffee, tea, caffeinated alcoholic drinks, cocoa, chocolate, soft drinks, especially cola, and is an important component of energy drinks and other dietary supplements. [1]
Caffeine dependence can cause a host of physiological effects if caffeine consumption is not maintained. Withdrawal symptoms may include headaches, fatigue, difficulty concentrating, lack of motivation, mood swings, nausea, insomnia, dizziness, cardiac issues, hypertension, anxiety, backaches, and joint pain; these can range in severity from mild to severe. [18]