The World Health Organization (WHO) can really put a damper on a picnic. When you're wolfing down hot dogs, sausages and other tasty processed meats, try not to think about the WHO's classification of these treats as known carcinogens.

Tobacco, asbestos…hot dogs. They're all Group 1 carcinogens in the WHO's book, meaning convincing evidence suggests they cause cancer in humans. Red meats such as beef, pork and lamb are Group 2A carcinogens, meaning they "probably" cause cancer.

What's a red-blooded, meat-eating person supposed to do? The answer is the antithesis of a meat-heavy diet: a plant-based diet. This type of diet has long been known to provide multiple health benefits, and now, two recent studies identify a beneficial association specifically for men's prostate health.

The separate studies looked at plant-based diets and their impact on prostate cancer risk and prostate-specific antigen (PSA) levels. PSA is a protein