Diets will be self-selected, low-fat, low-cholesterol, NCEP Step 2 diets (<7% saturated fats, <200 mg dietary cholesterol/d). The test and control margarines will be provided free. The oat bran bread will be provided at cost. The control diet will encourage a low saturated fat intake (<7%) by the use of low fat dairy products and egg substitutes (Fleischmann's egg beaters). Fiber will be increased to 17 g/1000 kcal recommending insoluble cereal fiber and whole meal or whole grain flour cereal products which are lipid neutral but conform to current diet guidelines for fiber intake and appear to offer protection from CHD. This will ensure equal total fiber intake on the NCEP and Portfolio diet. The control margarine (45 g/d) will have the same fatty acid composition as the test margarine. The Portfolio treatment diet will have a similar fatty acid and macronutrient profile to the control treatment diet. Low-fat Dairy and egg protein sources will be replaced with soy (approximately 45 g/d) protein. Foods will include soy dairy foods (milks, yogurts & cheese), and meat analogues made from soy isolate (dogs and burgers etc) and tofu products. The fiber will include at least 15 g viscous fiber daily from oats, barley, dried beans, peas, lentils and psyllium cereal. Plant sterols (1g/1000 kcal diet) up to 3g/day will be recommended from the test margarine provided which will be consumed up to a quantity of 40 g/day. A control margarine in the same quantity (25-40 g/d) will be provided to the participants in the control group. Almonds (22g/1000 kcal), the FDA recommended dose for cholesterol reduction) will also be included in the diet. The protein and fiber components will be individualized as much as possible to achieve study goals while satisfying individual preferences. The portfolio diet will be prescribed at two levels of reinforcement. In one portfolio cohort, the advice will be general and provided on 2 occasions over a 6 month period. For the second portfolio cohort, the advice will be much more intensive and provided on 7 occasions (total of 8 visits) over a 6 month period. Participants in the control and less intensive portfolio treatment groups will be seen at weeks 0, 12, 24 and optionally at 36 and 52 weeks. While participants in the intensive portfolio treatment group will be seen at two-weekly intervals for the first month and then monthly for the next five months (with a final visit at 6 months) and at two monthly intervals thereafter (if study is extended to 12 months) to ensure the diet plan is acceptable. Participants, in the intensive advice group, will be provided with self-taring scales on which to weigh all food to be consumed.