The secret to weight loss is no secret. Fewer calories consumed than expended. However, this is easier said than done. The problem with processed foods is the amount of sugar and fat contained therein which stimulate more eating. I was 348lbs and couldn't find a way to lose weight despite working out with a trainer. I didn't have the stamina to exercise enough to expend a large number of calories. Since I've had a gastric bypass, I've lost 130lbs. Now, I find it much easier to manage my weight (I still have to manage weight, just easier to do so). For me, the key is making vegetables a key component of my diet. Both raw and cooked vegetables add volume without adding lots of calories. I get full with fewer calores (see Barbara Rolls, Volumetrics). Vegetables, fruits, lean protein and whole grains, low fat dairy, beans, nuts, seeds. When I eat this way, the cravings associated with sugar go away with my main source of sugar being whole fruit. I'm satisfied with fewer calories and I am taking in more nutrients and my weight drops accordingly. When I was eating high sugar, high fat foods, my appetite was hardly ever satisfied and I would eat into the night. Exercise is important for me in weight control, not because of calorie expenditure. but because of improved body image. I am more motivated to eat well when I exercise. Exercise is very important for weight maintenance. Research by Rena Wing shows that those who maintain weight loss are likely to exercise 60 minutes or more daily.