Coffee is the most consumed stimulant in the world,
Short term benefits include mental alertness and improved athletic performance.
Short term adverse effects including headache, anxiety, tremors, and insomnia.
Long term adverse affects include generalized anxiety disorder and substance abuse disorders.
Long–term benefits are dose–dependent. Caffeine is associated with a reduced risk of Parkinson disease, Alzheimer disease, alcoholic cirrhosis, and gout. Both caffeinated and decaffeinated coffee are also associated with a lower risk of type 2 diabetes.
Heavy coffee intake may trigger coronary and arrhythmic events in susceptible individuals, although coffee intake is not considered a long–term risk factor for myocardial disease.
Most studies show a modest inverse relationship between coffee consumption and all–cause mortality.
Caffeine withdrawal is a well–documented clinical syndrome with headache being the most common symptom. Caffeinated coffee intake may be associated with significantly reduced cancer recurrence and improved survival in patients with stage 3 colon cancer, suggests new research published in the Journal of Clinical Oncology. Researchers noted that consuming four or more cups of coffee a day led to the greatest reduction in colon cancer recurrence risk.Coffee caffeine may aggravate pre-existing conditions such as migraines, arrhythmias, and cause sleep disturbances. Caffeine withdrawal from chronic use causes consistent effects typical of physical dependence, including headaches, mood changes and reduced cerebral blood flow.
Physical dependance is very common who consumed caffeinated drinks.
Low risk of type-2 diabetes with caffeinated drinks.
Coffee aggravates GERD & LPRD incidences.
Coffee also decreases the risk of liver,colon cancer & increase the risk of urinnary bladder cancer.
Coffee increase blood pressure, heart rate, headache,acidity.
Coffee is benefecial in ASTHMA patient as it dilate the bronchus & bronchioles.

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