Scientifit article: Red and processed meat may be positively associated with prostate cancer via mechanisms involving heme iron, nitrite/nitrate, grilling/barbecuing, and benzo[a]pyrene.
Meat and meat-related compounds and risk of prosta… [Am J Epidemiol. 2009] – PubMed result.

 
There was a time when red meat was a luxury for ordinary Americans, or was at least something special: cooking a roast for Sunday dinner, ordering a steak at a restaurant. Not anymore. Meat consumption has more than doubled in the United States in the last 50 years.
Now a new study of more than 500,000 Americans has provided the best evidence yet that our affinity for red meat has exacted a hefty price on our health and limited our longevity.
The study found that, other things being equal, the men and …