Even though unprocessed meat can be healthy and nutritious, the same is NOT true for processed meats. Studies show that people who eat processed meats have a higher risk of many serious diseases, including colon cancer, type 2 diabetes and heart disease.
Most of these studies are observational in nature, so they can not prove that the processed meat caused the diseases. However, the statistical link is strong and consistent among studies, so I do believe there is something to it.
Alternatives: If you want to eat bacon, sausages, pepperoni and other “processed” meats, then choose wisely and try to buy them locally from sellers who don’t add a lot of unhealthy ingredients. Quality counts.