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The FDA cites 400 mg of caffeine per day "as an amount not generally associated with dangerous, negative effects." But caffeine's impact can vary from person to person, all depending on how ...
However, caffeine, particularly when it’s overused, can cause unwanted side effects like “insomnia, digestive problems, increased blood pressure and faster heart rates,” Vuppuluri says.
What time should you stop drinking caffeine during the day? Feller recommends that people keeping a 9 a.m. to 5 p.m. workday schedule limit their caffeine intake to the hours before noon.
Caffeine dependence can cause a host of physiological effects if caffeine consumption is not maintained. Commonly known caffeine withdrawal symptoms include headaches, fatigue, loss of focus, lack of motivation, mood swings, nausea, insomnia, dizziness, cardiac issues, hypertension, anxiety, and backache and joint pain; these can range in severity from mild to severe. [18]
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.
In fact, the FDA estimates toxic effects, like seizures, can be observed with rapid consumption of around 1,200 milligrams of caffeine, or 0.15 tablespoons of pure caffeine.
The FDA’s recommendations regarding daily caffeine consumption for adults are uncomfortably noncommittal. Their 2023 report states that 400 milligrams a day is “an amount not generally ...
When consumed in moderation, caffeine can have many beneficial effects. However, over the course of several years, chronic caffeine consumption can produce various long-term health deficits in individuals. Among these, rodent studies have suggested caffeine intake may permanently alter the brain's excitability. [23]