Fowl has been found clearly less harmful than mammal meat, but we have not found any evidence that it is superior to a vegan diet, so long as there is enough protein in the diet. Indeed, one English researcher found a vegan diet was linked with greater longevity in a 14-year prospective study. These are vegetable oils that have been partially hydrogenated to solidify them for margarine and to increase the shelf-life of many commercial products such as crackers, cakes, cookies, etc. One margarine without trans-fats is Smart Balance. Most all recipes calling for butter or shortening or margarine can be made with Smart Balance or with olive or canola oil although there may need to be some adjustments for oil.
Salt is also a cause of osteoporosis and a minor cause of some cancers.
Avoiding most canned foods, all lunch meats, and added salt is important. Salt-free baking powder is available and is high in potassium, instead of sodium. It is a much less expensive way of adding potassium to the diet than purchasing potassium supplements. Potassium is very healthy and reduces some of the harmful effects of sodium. Fortunately, fresh foods and legumes are high in potassium.