The ketogenic diet tries to bring carbohydrates down to less than 5 percent of a person’s daily caloric intake – which means eliminating most grains, fruit, starchy vegetables, legumes and sweets. Instead, it replaces those calories with fat. That fat is turned into ketone bodies, which are an alternative energy source: besides glucose derived from carbohydrates, ketones from fat are the only fuel the brain can use.
^ Jump up to: a b c d e f g h i j k l m n o p q r s Kossoff EH, Zupec-Kania BA, Amark PE, Ballaban-Gil KR, Bergqvist AG, Blackford R, et al. Optimal clinical management of children receiving the ketogenic diet: recommendations of the International Ketogenic Diet Study Group. Epilepsia. 2009 Feb;50(2):304–17. doi:10.1111/j.1528-1167.2008.01765.x. PMID 18823325
The military diet is similar to other three-day diet plans (think: the Mayo Clinic and Cleveland Clinic three-day diet plans) as it claims to promote weight loss in a short period of time by restricting calories. The diet also bears a striking resemblance to the retro Drinking Man's Diet (or the Air Force Diet) of the '60s, according to Adrienne Rose Johnson Bitar, Ph.D., postdoctoral associate at Cornell University who specializes in the history and culture of American food, pop culture, and health. Much like the military diet, the Drinking Man's Diet incorporated martinis and steak in the diet but kept carbohydrate and calorie counts fairly low, she explains. "Both of these diets were low-calorie or low-carb plans that promised impressive short-term results, but included unhealthy or indulgent foods," says Bitar. (Another unhealthy diet trend that includes lots of red meat: The Vertical Diet. Safe to say, you can skip that diet plan, too.)
Some people can't eat grapefruit because it interacts with certain medications. Others just don't care for it. Either way, don't substitute it with oranges or orange juice. Oranges won't give your body the same alkalizing effect that grapefruit produces. In fact, oranges promote more acidic pH balances. The more acidic the pH balance, the easier it is for the body to store fat.
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.
Staying motivated to lose weight can be tough, but it’s key to weight loss. When we skip a workout or overeat and use the dreaded words “I’ll start again on Monday” or “I’ll start again tomorrow” we are missing a great opportunity to learn and move on, to hit our reset buttons. The single most important lesson I can teach you about weight loss is that everyone messes up. It’s the people who mess up and get over it (aka: hit their reset button) that succeed.
But if no carbs are available, our bodies start burning fat as a primary fuel source and producing ketones in the liver, which the body can turn into energy. This metabolic state, called ketosis, is what happens when someone is starving. But it's also how Harper's body works every day. His system relies on fats like butter, oil, and lard as a primary energy source instead of packing them on as in-case-of-emergency poundage.
Gary D. Foster, Ph.D., Holly R. Wyatt, M.D., James O. Hill, Ph.D., Brian G. McGuckin, Ed.M., Carrie Brill, B.S., B. Selma Mohammed, M.D., Ph.D., Philippe O. Szapary, M.D., Daniel J. Rader, M.D., Joel S. Edman, D.Sc., and Samuel Klein, M.D., “A Randomized Trial of a Low-Carbohydrate Diet for Obesity — NEJM,” N Engl J Med 2003; 348:2082- 2090. http://www.nejm.org/doi/full/10.1056/NEJMoa022207.
If you choose to finish dieting after these last 4 days, you should also strive to maintain a healthy diet full of healthy fats, proteins, lots of fresh fruit and vegetables and whole grains. You can find more information about losing weight through a healthy, 1700 calorie diet here. Other ideas for leading a healthy diet are also discussed in the sections below.
However, it's safe to say that no one really knows the origin of the military diet, Yurechko said, as it is certainly not approved by the military. But if you are still a tad bit curious about taking this diet out for a spin, we spoke to some experts on the subject to make sure you have all the ins-and-outs. Here are some takeaways to keep in mind.

1. High Intensity Interval Training (HIIT): This type of exercise is your key to melting belly fat fast.  HIIT is highly effective for all over weight loss, particularly removing stubborn belly fat. If you are not eating right, you have reached menopause or you are not losing weight you should do these exercises. Don’t let the name scare you as it is you who determines the intensity.  It is your perceived exertion that counts.
The Military Diet’s focus on small quantities of high-fat food might leave you feeling hungry, too. “This is allowing a very little bit of rich food,” explains Gomer, noting that you’ll still feel hungry despite indulging in ice cream each night. “It makes me frustrated because I could give people six times the amount of food [for the same amount of calories],” says Gomer.
“For weight loss, it’s important to eat foods with plenty of protein and fiber to keep you full throughout the day and prevent you from overeating. I like to recommend opting for plant-based proteins, since they tend to have fewer calories than their meat counterparts,” says Rizzo. A 1/2 cup of cooked lentils has 12 grams of protein for just 140 calories. It's super versatile and can be added to grain bowls, salads, soups, and more.

I've learned that if I am around food for long enough, I will eat it. It doesn’t matter if I am hungry or if the food even looks good; I'll just start nibbling out of habit. When my husband would get home late from work, I would typically eat a dinner by myself and then eat more with him when he got home. I tried to sit with him at the table and not eat, but eventually, I would start picking at his plate. Over time, I realized that I needed to sit either across the table or on a nearby couch to avoid the thoughtless habit. He didn’t mind either way and moving away from the food actually allowed me to focus more on him.
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