Bacon is linked to early mortality: A study published in the journal BMC that examined 448,568 men and women between the ages of 25 and 69 from different countries, concluded that the participants who ate more processed meat like bacon were associated with premature death due to certain types of cancer or cardiovascular disease.
Sources:
http://www.huffingtonpost.com/2013/10/16/bacon-male-fertility-semen-quality-sperm-count_n_4102091.html
https://draxe.com/why-you-should-avoid-pork/
http://www.webmd.com/food-recipes/can-bacon-be-part-of-a-healthy-diet
http://healthyeating.sfgate.com/harmful-effect-much-bacon-2643.html
http://www.alphagalileo.org/ViewItem.aspx?ItemId=129056&CultureCode=en