What if drink your morning coffee was also a healthy gesture? In any case, this is what a recent study published in the online journal suggests. BMJ Open. According to this research, drinking several cups of coffee each day could be linked to a lower risk of developing prostate cancer. Specifically, each additional daily cup was associated with a relative risk reduction of almost 1%.
Previous studies had already established a lower risk of cancer liver, intestine and breast depending on the coffee consumption. Prostate cancer is most common in men, its 5-year net survival rate is over 90%.
For this study, the researchers searched research databases and grouped together many studies. The included studies were performed in North America (7), Europe (7) and Japan (2). They included more than one million men (1,081,586) of whom 57,732 developed prostate cancer. The highest level of consumption ranged from 2 to 9 cups or more per day, the lowest level ranged from none to less than 2 cups per day.
Compared to the lowest category of coffee consumption, the category with the highest coffee consumption was associated with a 9% reduction in prostate cancer risk. And every extra daily cup was associated with a 1% risk reduction. In addition, the higher intake was associated with a 7% lower risk of localized prostate cancer and a 12-16% lower risk of advanced and fatal prostate cancer.
Anti-inflammatory and antioxidant effects
However, the researchers specify that certain factors were not taken into account which could thus distort the estimate of the risk. In addition, the type of coffee and the preparation methods vary according to the studies. But, scientists point out that there are many biological explanations that can validate these discoveries. Indeed, the authors assure that coffee improves glucose metabolism, has anti-inflammatory and antioxidant effects. It also affects the levels of sex hormones, which can influence the development and progression of prostate cancer.
“This study suggests that increased coffee consumption may be associated with a reduced risk of prostate cancer. More research is still needed to explore the underlying mechanisms and active compounds in coffee. In addition is shown to be a causal effect, men could be encouraged to increase their coffee consumption to potentially reduce the risk of prostate cancer, ”conclude the authors of this study.