Does drinking coffee increase the risk of bladder cancer?

A new study suggests that drinking coffee can prevent bladder cancer caused by smoking. Preliminary research shows that half of bladder cancer patients smoke, but they do not drink coffee. This suggests that coffee may have some effect on tobacco. Almost everyone believes that the best way to reduce the incidence of bladder cancer is to stop smoking.

Studies show that coffee smokers still have three times the incidence of bladder cancer as coffee non-smokers, but non-coffee smokers have seven times the incidence of bladder cancer as non-coffee smokers. A few years ago, a study found that the difference between coffee drinkers and non-coffee drinkers was that drinking a small amount of coffee could reduce the risk of bladder cancer, but this finding was only reflected in non-smokers.

Smoking is an important cause of bladder cancer. Data show that 50% of men and 30% of women with bladder cancer are caused by smoking.

Tobacco increases the risk of bladder cancer by 2-5 times, and this risk will last for 2-4 years, while drinking coffee can reduce this risk.

A Spanish study of 1,100 people without the disease, who were given the habit of smoking and drinking coffee, showed that those who drank two cups of coffee a week had a significantly lower risk of bladder cancer than those who never drank coffee.