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Caffeinated coffee and tea may reduce risk of cardiometabolic disease including heart attack, stroke, and type 2 diabetes, study finds. ... People who drank about 200 to 300 mg of caffeine a day ...
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.
A number of fatalities have been caused by overdoses of readily available powdered caffeine supplements, for which the estimated lethal amount is less than a tablespoon. [13] The lethal dose is lower in individuals whose ability to metabolize caffeine is impaired due to genetics or chronic liver disease. [14]
Caffeine is classified as a non-selective adenosine receptor antagonist. Epidemiological and laboratory data are interpreting that consuming caffeine and coffee are linked to a reduced risk of developing Parkinson's disease. [3] It is unresolved what caffeine's mechanism is on parkinsonian effects.
People who chronically drink high amounts of caffeine — equivalent to four cups of coffee or two energy drinks — may increase their risk of cardiovascular disease, a new study indicates.
In pharmaceutical sciences, drug interactions occur when a drug's mechanism of action is affected by the concomitant administration of substances such as foods, beverages, or other drugs. A popular example of drug–food interaction is the effect of grapefruit on the metabolism of drugs.
The antacids have no interaction between them, so they would be considered to have additive effect when taken together. Drugs that are in the same class, but do not have the same target, may also act additively by interacting with different targets in the same pathway. For example, propofol and sevoflurane can both produce anesthetic effects. [6]
Caffeine keeps you awake by blocking adenosine receptors. Each type of adenosine receptor has different functions, although with some overlap. [3] For instance, both A 1 receptors and A 2A play roles in the heart, regulating myocardial oxygen consumption and coronary blood flow, while the A 2A receptor also has broader anti-inflammatory effects throughout the body. [4]