What Happens If You Cheat On A Phase 3 Steak Day? The Maintenance Phase of the HCG Diet Plan is designed to help you Stabilize and Maintain your new weight. In a nut shell, the Maintenance Phase, or Phase 3 as it's also referred to, goes as follows: For the first 3 weeks of Phase 3, you will increase your caloric intake to approximately 1500 Calories per day. At the same time, you don't want to constantly stress yourself out about going over the 1500 Calorie mark; if you do happen to go over or fall under that amount you should be fine. In addition, for the first 21 days while stabilizing, you should stay away from foods with sugars, like honey and high fructose corn syrups, and starches like bread pasta and potatoes. After those initial 3 weeks you can then start to slowly add in the sugars and starches. But remember, because you are not worrying so much about the calories, it is a must that you practice good portion control with your meals as well. Now even th...