Eating less than 500 grams of red meat a week can reduce the risk of an aggressive tumour by 38 per cent, a significant amount.
The red meat rule is the single most important lifestyle change a man with prostate cancer can make, say researchers from the University of California's Comprehensive Cancer Center.
But he can also help himself by exercising regularly, keeping his body-mass index (BMI) under control, and eating more healthy foods such as fruits, non-starchy vegetables and pulses.
These changes can determine whether the tumour is benign and slow-growing or aggressive, the researcher concluded after testing the ideas on 2,212 men, aged between 40 and 70 years, who had all recently been diagnosed with prostate cancer.
(Source: Nutrition and Cancer, 2013, published online, 29 June)