What You Can Eat With The Pritikin Principle continued...

Not surprisingly, the more processed the food, the more likely they are packed full of calories. Corn, for instance, starts out at a somewhat reasonable 490 calories per pound. By the time it ends up in a tortilla chip at your favorite Mexican restaurant, it's skyrocketed to 2,450 calories per pound. However, eat it with guacamole, and the combination (avocado dip with the chips) drops the number to 1,450 calories per pound.

The plan is to eat food with a large volume of fiber and water to fill up your stomach -- vegetables, fruits, beans, and natural, unprocessed grains. These foods, he claims, "create tremendous feelings of fullness, or satiety, in your stomach." In addition to eating three meals a day, the program incorporates two "calorically light" snacks as well. While Pritikin doesn't have you counting calories, you do have to possess a basic understanding of how to calculate the "average caloric density of your meal," and then keep that average below a certain number.

Exercise is strongly recommended, and walking is his favorite. How much is just right to maintain weight loss? Based on observations of obese people who lost weight and kept it off, Pritikin suggests "All of us should use ... 30 miles a week as a goal." For the rest of us, however, he suggests one 30-minute walk a day. Going at a good clip, you might average 12 to 15 miles a week.

How The Pritikin Principle Works

To lose weight, most of us will need to keep the average caloric density of each meal below 400 calories per pound. Since most vegetables fall below 200 calories per pound, when they are eaten with meat and starches, they bring down the calorie average of each meal. High-carbohydrate food, along with pasta and hot cereals, range between 230 to 630 calories per pound. Animal protein goes from 400 calories per pound (some fish) to 1,400 (that juicy porterhouse steak) to 2,170 (bacon). By combining the leanest portions of animal protein with plenty of vegetables, you can get the caloric density down to a level where you will lose weight, according to Pritikin's plan.

To keep within the suggested guidelines, Pritikin suggests we eat whole, unprocessed, and natural carbohydrate-rich foods, such as grains, vegetables, and fruit. Those preferred are:

• Brown rice
• Millet
• Barley
• Oats
• A wide assortment of dark green lettuces
• Onions
• Potatoes
• Squash
• Beans (black turtle beans, chickpeas, lentils, lima and pinto beans)
• Apples
• Pears
• Strawberries
• Bananas

Some processed whole-grain foods, such as oatmeal, are acceptable. Even white-flour pasta is okay, as long as it is combined with vegetables to bring down the caloric density of the whole meal.

Other guidelines: Eat small portions of lean beef, chicken, and low-fat dairy products. Fish is fine, preferably three servings per week of omega-3 rich seafood. Avoid fried foods, dressing with fat, and fatty sauces. Eat frequently. Have three meals a day plus two snacks. Stay active and avoid salty foods. Artificial sweeteners such as Splenda are okay. And decaf tea, once frowned upon, is fine.

The New Pritikin Program contains several pages of suggested meals and tips on how they might be improved with substitutions, as well as a restaurant guide for everything from a Junior Bacon Cheeseburger at Wendy's to buttered noodles in a French restaurant to a serving of almond chicken in a Chinese establishment. More than 50 recipes are also included.