Keep the consumption of food preserved by salt curing, salt pickling, and smoking to a minimum. It has been found that in countries such as China, Japan, and Iceland where such foods are consumed, there is a higher incidence of the cancer of the esophagus and the stomach. Cut back on sausages, smoked fish and ham, bacon and hot dogs. Alcoholic beverages should be consumed only on moderation. Heavy drinking, especially in combination with cigarette smoking, has been associated with an increased risk of cancer of the upper gastrointestinal and respiratory tracts, as well as other adverse health effects.
Many people also believe that dietary protein is also linked to cancer.
Many experts believe that American consume too much protein. There is not a consensus on this matter. Refer to the sections on Nutrition, Vitamins for appropriate scientific basis for diet therapy. Individual recommendations appropriate for specific illnesses are given under the appropriate title .