Scientists reviewing 15 studies that included more than 4,700 subjects have concluded that those who consume processed meats (bacon, sausage, smoked ham, etc.) significantly increase their risk of stomach cancer. Stomach cancer is the 4th most common type of cancer and accounts for approximately 10 percent of cancers that result in death. According to their findings, for every ounce (30 grams) increase in consumption of processed meats, the risk of stomach cancer increases anywhere from 15 to 38 percent. In order to lengthen their shelf lives, processed meats are often salted, smoked and/or have nitrates added to them. However, this could very likely be responsible for the increased incidence of cancer rates.
Source: Reuters. August 2, 2006.