This includes bacon, ham, pastrami, salami, pepperoni, hot dogs, some sausages, and hamburgers (if they have been preserved with salt or chemical additives) and more. Previous studies have linked processed meats such as sausages, hot dogs, and sandwich meats to an increased risk of cancer, male infertility, and early death.
For example, a 2007 analysis by the World Cancer Research Fund (WCRF) found that eating just one sausage a day may raise your risk of bowel cancer. Specifically, 1.8 ounces of processed meat daily – about one sausage or three pieces of bacon – was found to raise your likelihood of the cancer by 20 percent.
The American Institute for Cancer Research (AICR) has long recommended avoiding processed meats entirely for this reason. The institute explicitly warns that that "there is no safe threshold" for eating processed meats. It also recommends limiting red meat to a maximum of 18 ounces per week, to avoid raising your risk for colorectal cancer.
Processed Meats Now Classified As Group 1 CarcinogenAfter reviewing some 800 studies, the International Agency for Research on Cancer (IARC), which is part of the World Health Organization (WHO), also recently concluded that processed meat can cause colorectal cancer in humans, classifying it as a Group 1 carcinogen.
When it comes to CAFO meats and processed meats, the latter of which contain a number of potentially harmful food additives, the cancer link may actually be due to the way such meats impact your gut flora. We also know that glyphosate can have a significantly detrimental impact on healthy gut bacteria, and CAFO animals are typically fed grains contaminated with glyphosate. This affects not only the animals' health, but your health as well.
Dr. Brad Niewierowski
Source: Processed Meats Declared Carcinogenic Mercola.com November 11, 2015