The South Beach Diet was created by Dr. Arthur Agatston, a preventative cardiologist living in Miami Beach, FL and it has 3 phases. The 1st phase of the plan is the most restrictive and lasts 2 weeks. It is designed to eliminate cravings for refined starch and sugar, as well as jumpstart weight loss. During this phase, you are prohibited from all sugars, processed carbohydrates, fruits, alcohol and certain higher-glycemic vegetables. The 2nd phase will last until you reach your goal weight. During this time, you will reintroduce "good" carbs, such as whole grain bread and fruit, and are allowed to have a glass of white or red wine with dinner. The 3rd phase lasts indefinitely and is designed to help you continue using the principles you've learned in the previous phases to maintain a healthy weight for life.
Developed by physician and cardiologist Dr. Robert Atkins, the Atkins Diet dramatically restricts the consumption of carbohydrates, while emphasizing an increased consumption of protein, fat (including saturated fat) and leafy vegetables. The Atkins plan includes 4 main phases, during which time the goal is to find your Atkins Carbyhydrate Equilibrium (ACE). Your ACE is the daily amount of carbs you can consume without gaining or losing weight. The 1st phase lasts 2 weeks and is the most restrictive with a carb intake limited to 20 net grams per day. It is designed to switch your body to a metabolic state of "ketosis" and kick start your weight loss. The 2nd phase lasts until you are 5 - 10 pounds from your goal weight. During this phase, you will gradually increase your daily net carb intake to determine how many net carbs you can consume and still maintain a healthy weight loss of 1-2 pounds per week. In the 3rd phase, you will determine your ACE, and, in the 4th phase, you will learn how use the good habits you've acquired in the previous phases to make permanent lifestyle changes.
Created by biochemist Dr. Barry Sears, the Zone Diet controls dieters' food intake using a "food block" system, which assigns values to different foods. For example, 1 food block could equal 12 spears of asparagus or 1 ounce of chicken or 1/3 teaspoon of olive oil. Most women are able to consume 11 food blocks a day, while most men will be allowed 14. Eating in the right proportions is also essential on the Zone Diet. Each meal should be 40% carbs, 30% protein (low-fat), and 30% of healthy fat. When putting together your plate, 1/3 of it should be filled with a low-fat protein (3 oz for women or 4 oz for men), and the other 2/3 of it should be filled with low-GI carbs (ex. vegetables, lentils, beans, whole grains or fruit). You can then use a "dash" of heart-healthy monounsaturated fat (ex. olive oil, canola oil, macadamia nuts, and avocados) on top. Finally, the Zone requires keeping a food journal where you track what you ate and how you felt after 4 hours. If you aren't hungry and your mind is clear, your body is in The Zone.