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Purdy suggests swapping a highly caffeinated drink to one with less caffeine, such as green tea in place of coffee, which has about 30 to 50 mg of caffeine per cup compared with coffee’s 95 to ...
In fact, one small study of subjects who showed signs of memory problems found that over a 2- to 4-year period, people with lower blood levels of caffeine were more likely to develop dementia than ...
A cup of the caffeine-rich brew gets the heart pumping and is essential for many people in the morning. Three-quarters of U.S. adults drink coffee during the week, according to the National Coffee ...
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's biological half-life – the time required for the body to eliminate one-half of a dose – varies widely among individuals according to factors such as pregnancy, other drugs, liver enzyme function level (needed for caffeine metabolism) and age. In healthy adults, caffeine's half-life is between 3 and 7 hours. [5]
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]
Recent research reveals that caffeine has health benefits for most moderate coffee drinkers. Here are the pros and cons of drinking certain coffees, with expert insights and advice.
Coffee substitutes are non-coffee products, usually without caffeine, that are used to imitate coffee. Coffee substitutes can be used for medical, economic and religious reasons, or simply because coffee is not readily available. Roasted grain beverages are common substitutes for coffee.