Cancer is a very perilous disease, because it kills more than half million people every year. For example, researchers showed in a study that each year, worldwide around one million new cases of bowel cancer are diagnosed.

But in Australia, bowel cancer is the most commonly diagnosed cancer and there are more than 12,000 new cases each year. Scientists recently found that the main culprits in bowel cancer are alcohol and tobacco.

The researchers of this study examined more than 100 international published studies on the link between major and modifiable risk factors for colorectal cancer including alcohol, smoking, diabetes, physical activity and various dietary elements and they have found that risk factors such as alcohol use and cigarette smoking are the main risk factors for bowel cancer.

The researchers found also that people who consume the largest quantities of alcohol have 60% greater risk of developing the cancer, compared with non-drinkers and smoking, obesity and diabetes were also linked with a 20% greater risk of developing bowel cancer.

Lead researcher Associate Professor Rachel Huxley said that the most people are aware that being overweight and having poor dietary habits are risk factors for the disease, but are probably unconscious that other lifestyle factors such as alcohol consumption, cigarette smoking and diabetes are also the main risk factors.

WHO has informed all people that healthy will be if individuals would drink no more than two standard drinks per day.

The researchers also added that while physical activity lowered an individual's risk of the disease, there was surprisingly little evidence to indicate that high intakes of fruit and vegetables were protective against bowel cancer.

Huxley reported also that the findings strongly suggest that many cancer cases could possible be avoided by making relatively modest lifestyle regulations such as drinking less alcohol, quitting smoking, eating healthfully and being a little more active.

Researchers also concluded that smoking and alcohol do not have an effect on the ovarian cancers risk. And reducing alcohol intake and cessation of smoking is not likely to have a substantial impact on risk of ovarian cancer.

They add that the possibility that caffeine may reduce ovarian cancer risk, particularly for women who have not previously used exogenous hormones, is intriguing and guarantee further study, including an evaluation of possible biological mechanisms.