If you limit your fat intake, you should increase your calories from carbohydrates to supply your body's energy needs. The average American diet is relatively low in fiber. There is also concern that low fiber diets might increase the risks of developing cancer of the colon, but whether this is true is not yet known. To make sure you get enough fiber in your diet, you should eat fruits and vegetables, whole grain breads and cereals. There is no reason to add fiber to foods that do not already contain it.
Inactivity is the main cause of that creeping weight with age.
Learn to balance the amount of calories you consume with the amount of calories you expend in daily activities to maintain a desirable weight. Eating extra saturated fat and cholesterol will increase blood cholesterol levels in most people. However, there are wide variations among people - related to heredity and the way each person's body uses cholesterol. For the U.S. population as a whole, reduction in our current intake of total fat, saturated fat, and cholesterol is sensible. This suggestion is especially appropriate for people who have high blood pressure or who smoke.