1. Everything you eat should be as fresh as possible. Spoiled, moldy, or rancid foods, especially if they contain rancid fats or oils, are high in carcinogens. Throw out perishables that are more than three days old or put them on the compost pile unless they are meat, bones, or foods high in grease or oil. Reduce your consumption of preserved foods unless they are fermented. (See #6 below.) Choose fresh, raw foods over canned or even frozen foods. Just picked is even better. (We recommend growing your own vegetables and fruits, if possible.)
2. Reduce your consumption of deep-fat fried foods, especially French fries, which are often made in old, rancid oil or hydrogenated oil. Reduce your consumption of beef and pork, which are high in fat, much of which is polyunsaturated and becomes rancid more quickly. Eat more fresh fish (from unpolluted waters), lamb, fowl, and wild game.
3. Increase your consumption of foods high in vitamin C: oranges, limes, lemons, green peppers, ripe tomatoes, etc. Use natural vitamin C powder mixed into freshly-squeezed orange juice to increase your vitamin C intake.
4. Avoid fat and sugar. Try to reduce your consumption of ice cream, which has high levels of both fat and sugar, plus usually artificial coloring and flavoring. Avoid margarine completely; it is high in polyunsaturated, hydrogenated fat (a totally artificial form of fat) and usually has artificial coloring and flavoring. Butter or olive oil, used sparingly, is better. Reduce your intake of processed oils, mayonnaise, salad dressings, etc.
5. Reduce your consumption of salt (except possibly in miso soup, see #6 below, if you aren't allergic to soy products), because cancerous cells are high in sodium, low in potassium, which is the exact opposite of normal cells. Vegetables, fruits, and cereals are high in potassium. Eat organic produce that is unsprayed with pesticides so that you don't have to wash them very much; potassium is water soluble and is easily lost by soaking or washing the fruits and vegetables in water. Avoid water softeners that add sodium and remove vital minerals such as calcium and magnesium in the water. Drink hard water that contains these minerals; use bottled spring water, if local water is soft or polluted.