Men aged 55 years and older who eat plenty of tomatoes every week can dramatically reduce their risk of developing the cancer, say researchers from the University of Illinois. It's best to eat them whole to get the full protective effect.
The risk of developing the cancer drops further still when soy is also added to the diet. Up to two servings a week of soy seems to magnify tomatoes' protective effects.
In one laboratory experiment with mice, only 45 per cent of those fed soy and tomatoes developed prostate cancer compared to 61 per cent of those given only tomatoes and 66 per cent fed only soy.
(Source: Cancer Prevention Research, 2013; doi: 10.1158/1940-6207.CAPR-12-0443).