Coffee, a brewed drink prepared from roasted coffee beans, has been in debate for long. A century's worth of research has proved that coffee's effects on human health is marginal at most unless a person belongs to some particularly sensitive group. The study suggested that the choice to drink or abstain from coffee will neither shorten nor lengthen a person's life in a noticeable way.
The earliest observation in this context was done as early in 1927 when many working-class children drank a cup or more of coffee per day. The research's initial result came out to be nothing but further observations claimed that coffee was not harmful. Further a study conducted in 1952 concluded that coffee fed throughout life exercised no unfavorable effect as indicated by disease or premature death. However, the research conducted in 1986 observed that drinking five or more cups of coffee per day nearly tripled the risk of coronary heart disease (CHD).
But only coffee cannot be held responsible for the increase in CHDs as genetics, exercise, smoking, stress, and diet all play roles in this. The researchers have now concluded that coffee prevents cancer, reduces the risk of cardiovascular disease and staves off diabetes.