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Drinking two to three cups of coffee or up to three cups of tea a day was the sweet spot, the researchers found. People who consumed about 200 to 300 milligrams of caffeine daily had a lower risk ...
Compared with people who did not consume caffeine at all or very little per day, people who drank 3 coffee drinks per day or 200 to 300 milligrams (mg) of caffeine a day had a 48.1% or 40.7% ...
How much caffeine is in coffee? ... ranges from about 80 to 100 milligrams of caffeine per cup,” says Pelitera. ... contain a little more caffeine—up to 200 milligrams—and a single shot of ...
The LD 50 of caffeine in rats is 192 milligrams per kilogram, the fatal dose in humans is estimated to be 150–200 milligrams per kilogram (2.2 lb) of body mass (75–100 cups of coffee for a 70 kg (150 lb) adult).
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.
According to the USDA National Nutrient Database, a 240-millilitre (8 US fl oz) cup of "coffee brewed from grounds" contains 95 mg caffeine, whereas an espresso (25 mL) contains 53 mg. [185] According to an article in the Journal of the American Dietetic Association, coffee has the following caffeine content, depending on how it is prepared: [182]
This amount typically provides under 400 milligrams (mg) of caffeine, the recommended upper limit, meaning most people can drink 3-4 cups of coffee without adverse effects from caffeine.
There is no standard value for "a cup of coffee." The caffeine content of cola drinks and most energy drinks can be difficult to determine, because in many cases the labels do not indicate the dose per serving. Caffeine doses in these beverages range from 20 to 30 mg in some soft drinks, up to 350 mg or more in some energy drinks.