Weight Watchers uses a PointsPlus system to help dieters measure daily food intake and to encourage them to make healthier choices. The PointsPlus system assigns a point value to different foods, which is calculated by its protein, carbohydrate, fat, fiber and calorie content, as well as by how difficult it is for the body to work it off. Each dieter is given a unique PointsPlus target according to their gender, height, weight and weight loss goals. You can basically eat whatever you want on the Weight Watchers program, as long as you stay within your daily PointsPlus target, but you are encouraged to eat more "Power Foods," which are considered the healthiest and most filling. "Power Foods" include whole grains, lean meats, low-fat dairy and (unlimited quantities of) fresh fruit and non-starchy veggies.
Nutrisystem offers gender-specific plans for adults (Core), diabetics (Nutrisystem D), seniors (Silver) and vegetarians (Vegetarian). You will purchase food shipments in 28-day supplies and can choose from pre-selected menus or pick out specific meals you'd like from more than 130 choices. The prepackaged meals are low in sodium, saturated and trans-fats, and they promote protein and low-GI carbohydrates. They are frozen or shelf-stable and will provide about 60% of your daily calorie intake. The other 40% will come from Nutrisystem-approved foods (i.e. fruits, veggies, protein and dairy) from your local grocery store. Once you've reached your goal weight, you can chat with a Nutrisystem counselor online or by phone if you want help/tips for transitioning away from prepackaged meals and back into the kitchen.