Basically, whatever you want — but you're only allotted 1,500 calories per day, so if you want to feel full, your best bet is sticking to healthy fare. The advantage is that instead of limiting yourself to the menu laid out for you on the first three days, you can divvy those calories up however you'd like. You can fill up on a salad, eat plenty of small fruit snacks throughout the day, or focus on your proteins. It's up to you and whatever you decide to make of it.
Depending on how often you repeat it, the Military Diet might reduce calories to a point where this slow down of metabolism kicks in – but what’s more likely happening is that as you lose weight, your body doesn’t need to burn as many calories because there’s less of you to manage every day! So your metabolism WILL slow down as you lose weight, but it’s not due to you eating fewer calories in a day.
In terms of weight loss, you may be interested in trying the ketogenic diet because you’ve heard that it can make a big impact right away. And that’s true. “Ketogenic diets will cause you to lose weight within the first week,” says Mattinson. She explains that your body will first use up all of its glycogen stores (the storage form of carbohydrate). With depleted glycogen, you’ll drop water weight. While it can be motivating to see the number on the scale go down (often dramatically), do keep in mind that most of this is water loss initially.
If you don't eat meat — or any animal products, for that matter — or if you have a food allergy, you can replace anything on the meal plan with foods that have a similar calorie count and provide the same nutrients. For example, instead of eating half a cup of tuna, you can eat about 2/3 cup of tofu. Instead of eating an egg at breakfast, you can drink a cup of soy milk. On day two of the military diet, cottage cheese substitution ideas include 15-20 almonds. Almonds work to sub out the slice of cheddar cheese, too. And instead of peanut butter, you can spread almond butter or sunflower butter on your toast for breakfast of day one.