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Caffeine is the world's most widely consumed psychoactive drug. [20] [21] Unlike most other psychoactive substances, caffeine remains largely unregulated and legal in nearly all parts of the world. Caffeine is also an outlier as its use is seen as socially acceptable in most cultures with it even being encouraged.
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.
There have been many studies examining the potential positive and negative effects of caffeine on a person’s health. Much previous research has focused on how caffeine might impact heart health.
On the one hand, caffeine effects appear to be detrimental to short-term memory, working memory included, whereas the effects are somewhat positive for memory over the long term (for example, remembering something better many days later if caffeine was ingested during encoding as well as retrieval, as opposed to no caffeine [7]). Many of the ...
Some have positive results; some experience no change, and others have some negative effects. The potential benefits of caffeine are increased focus and reaction time, reduced perceived effort ...
Caffeine can also be addictive, leading to withdrawal symptoms—e.g. headache, fatigue, irritability, and depressed mood—if you suddenly cut it out of your diet. These negative effects can ...
Caffeine has been proven to be effective in enhancing performance. Caffeine is a stimulant drug. [1] Once consumed, it is absorbed in the stomach and small intestine as well as being circulated throughout the body. [2] It targets muscles and organs, in particular the brain. Coffee beans . Caffeine is most commonly known for being in coffee. [3]
The scans revealed that both groups — those who consumed caffeine and those who drank coffee — had decreased activity afterward in a part of the brain that puts people in a resting state.