The Military Diet gets a lot of attention and an almost equal amount of scepticism. Depending on who you ask, it’s either a legitimate short-term weight loss tool or a crash diet dressed up with a tough-sounding name. The reality is somewhere in the middle — and worth understanding properly before you decide whether to try it.
This is the complete breakdown: what the diet actually is, the full 3-day meal plan, what to eat on the 4 days off, substitution options for everything on the plan, and an honest answer to whether it works.
What Is the Military Diet?
The Military Diet is a structured 3-day low-calorie eating plan followed by 4 days of normal (but controlled) eating. The cycle repeats weekly for as long as you want to follow it.
Despite the name, it has no official connection to any military organization. The name likely stuck because the plan is rigid, disciplined, and short — qualities associated with military training. It’s also sometimes called the 3-Day Diet or the Army Diet.
The core claim is that you can lose up to 10 pounds in a week. That number is real for some people, though a significant portion of it is water weight rather than fat — more on that below.
What makes it different from other crash diets: the 3-on, 4-off structure. Most extreme low-calorie diets fail because continuous restriction slows your metabolism and becomes unsustainable. The Military Diet avoids this by cycling — three days of strict restriction followed by four days of moderate eating. This cycling prevents the metabolic slowdown that makes traditional crash dieting so counterproductive.
How the Military Diet Works
During the 3 active days, total calorie intake sits between 1,100 and 1,400 calories per day — well below the typical adult maintenance level of 2,000–2,500 calories. This deficit is the primary driver of weight loss.
The specific foods on the plan are not random. The combination of high-protein foods, fibre, and specific micronutrients is designed to keep you satiated despite the low calorie count, support metabolic function, and prevent muscle loss as much as possible on a deficit this steep.
The 4 days off are not a free-for-all. Calorie intake should stay around 1,500 calories per day — above restriction levels, but not high enough to undo the deficit created during the active phase.
The 3-Day Military Diet Meal Plan
Day 1 (Approximately 1,400 calories)
Breakfast
- ½ grapefruit
- 1 slice of toast
- 2 tablespoons of peanut butter
- 1 cup of black coffee or tea (no sugar)
Lunch
- ½ can of tuna
- 1 slice of toast
- 1 cup of black coffee or tea
Dinner
- 3 oz (85g) of meat — any lean cut
- 1 cup of green beans
- ½ banana
- 1 small apple
- 1 cup of vanilla ice cream
Day 2 (Approximately 1,200 calories)
Breakfast
- 1 egg (cooked however you prefer)
- ½ banana
- 1 slice of toast
Lunch
- 1 boiled egg
- 5 saltine crackers
- 1 cup of cottage cheese
Dinner
- 2 hot dogs (no bun)
- ½ cup of carrots
- 1 cup of broccoli
- ½ banana
- ½ cup of vanilla ice cream
Day 3 (Approximately 1,100 calories)
Breakfast
- 1 slice of cheddar cheese
- 5 saltine crackers
- 1 small apple
Lunch
- 1 boiled egg
- 1 slice of toast
Dinner
- 1 cup of tuna
- ½ banana
- 1 cup of vanilla ice cream
Military Diet Substitutions
This is where most guides fall short, and it’s also one of the most-searched aspects of the diet — because not everyone eats tuna, tolerates dairy, or wants hot dogs. Here are direct substitutions for everything on the plan that preserve the calorie and macronutrient balance.
Protein substitutions
| Original | Substitution |
|---|---|
| Tuna | Any white fish, chicken breast, almonds (¼ cup), cottage cheese (½ cup), tofu |
| Hot dogs | Turkey dogs, tofu dogs, deli turkey or ham slices, lentils |
| Eggs | Chicken (1 oz per egg), bacon (2 slices), seeds (¼ cup) |
| Cottage cheese | Plain Greek yogurt (1 cup), ricotta (½ cup), eggs (2 whole) |
| Cheddar cheese | Ham (1 slice), eggs (1), cottage cheese (4 tablespoons) |
| Meat (dinner day 1) | Chicken breast, turkey, portobello mushrooms (for vegetarians), lentils |
Carb and fruit substitutions
| Original | Substitution |
|---|---|
| Toast | High-fibre crackers (same calorie count), rice cakes, high-protein bread |
| Grapefruit | ½ teaspoon baking soda in water (alkalinity substitute), orange (smaller portion) |
| Banana | Papaya, plums, apricots — match calorie count |
| Apple | Plums, peaches, grapes (1 cup) |
Other substitutions
| Original | Substitution |
|---|---|
| Peanut butter | Almond butter, sunflower seed butter, pumpkin seed butter |
| Green beans | Any green vegetable of similar calorie count — spinach, lettuce, tomatoes |
| Broccoli | Cauliflower, Brussels sprouts, asparagus |
| Carrots | Parsnip, beets, celery |
| Vanilla ice cream | Apple juice (1 cup), fruit-flavoured yogurt, banana ice cream (frozen blended banana) |
| Coffee/tea | Nothing — these are appetite suppressants that support the plan. If you must, herbal tea works but avoid adding milk or sugar |
| Saltine crackers | Rice cakes, whole grain crackers — match calorie count |
Important: substitutions should match the calorie count of the original as closely as possible. The plan works on specific calorie targets, not specific foods — so a swap that keeps the calories consistent is a valid swap.
The 4 Days Off: What to Eat
This is the part most people underestimate. The 4 days off are not a reward — they’re part of the plan. How you eat during this phase determines whether you actually keep the weight off.
Target: around 1,500 calories per day.
No specific meal plan is prescribed for these days, but the general principles are:
- Eat whole foods — lean protein, vegetables, fruit, complex carbohydrates
- Avoid processed foods, excessive sugar, and alcohol
- Don’t binge. The psychological temptation after three days of restriction is strong, but eating well above maintenance during the off days will undo most of what the active days achieved
- Stay hydrated — aim for at least 2 litres of water per day
- Light exercise is encouraged — walking, cycling, swimming. Nothing extreme is necessary, but staying active during the off days helps maintain the caloric deficit across the full week
A sensible approach for the 4 off days: eat three balanced meals of roughly 400–500 calories each, built around protein and vegetables, with healthy snacks if needed. This keeps your total for the week in deficit without making the off days feel like a continuation of the restriction.
The 7-Day and 10-Day Military Diet
Some people extend the Military Diet by continuing the 3-on, 4-off cycle for multiple weeks.
Over 4 weeks, following the cycle consistently, the reported range is 15–30 pounds of total loss — though individual results vary significantly based on starting weight, adherence during the off days, and activity level.
The 7-day version simply refers to completing one full cycle (3 days on, 4 days off). The 10-day version usually means completing one full cycle and then starting a second active phase, giving you 6 days of restriction and 4 of moderate eating over 10 days. This is more aggressive and not recommended for people new to the diet.
If you’re going beyond one cycle, pay close attention to how you feel. Fatigue, dizziness, and irritability during the active days are common and expected. Persistent weakness or difficulty concentrating is a sign to stop and eat normally.
Does the Military Diet Actually Work?
Yes — with an important clarification on what “work” means.
For rapid short-term weight loss: it works. The severe calorie deficit over 3 days will produce weight loss, and many people do lose close to 10 pounds in their first week. A portion of this is water weight — glycogen (stored carbohydrate) holds onto water, and depleting glycogen rapidly releases that stored water. Some of the early weight loss is real fat loss, and some of it will come back when you resume normal eating.
For long-term weight loss: the diet is not designed for that, and shouldn’t be used as if it is. It’s a short-term tool — useful before an event, a holiday, or as a reset after a period of overeating. People who use it as a long-term strategy tend to cycle through the yo-yo pattern of restriction and rebound.
The honest takeaway: if you follow the plan strictly — including the 4 off days — you will lose weight. How much is real fat loss versus water weight depends on the individual. The results are real; the sustainability is limited.
Is the Military Diet Safe?
For healthy adults using it for one or two cycles, the Military Diet is generally safe. It’s a short, defined period of calorie restriction, not a permanent dietary overhaul.
Who should avoid it or consult a doctor first:
- People with diabetes or blood sugar regulation issues — the calorie restriction and specific food combinations can cause significant blood sugar fluctuations
- Anyone with a history of disordered eating
- Pregnant or breastfeeding women
- People with kidney or liver conditions
- Anyone currently on medication where dietary changes could affect dosage or effectiveness
Longer-term risks: following the Military Diet for months at a time without breaks risks micronutrient deficiencies. The food variety is narrow and the calorie count is low enough that you won’t be hitting recommended daily intakes for everything your body needs. This is not a diet to run indefinitely.
Practical Tips for Getting Through the 3 Days
Drink a lot of water. It fills you up, reduces hunger between meals, and helps flush out the water weight the diet is displacing. Aim for 2–3 litres on active days.
Black coffee is your friend. It’s an appetite suppressant and contributes essentially zero calories. Both coffee and tea are on the plan for a reason — use them.
Don’t skip meals. The calorie count is already low. Skipping a meal might seem like it would accelerate results, but it increases the likelihood of overeating later in the day and makes the 3 days harder to complete.
Prepare your food in advance. Decision fatigue is real when you’re hungry and restricted. Having everything prepped and portioned means you’re not standing in front of the fridge making choices you’ll regret.
Keep the off days honest. The discipline required during the active days means nothing if the off days become an uncontrolled eating period. 1,500 calories on the off days is not starvation — it’s enough to eat well and feel satisfied.
The Bottom Line
The Military Diet is a genuine short-term weight loss tool, not a scam — but it’s also not a sustainable lifestyle. Used correctly, one or two cycles can produce real, visible results quickly. Used carelessly — bingeing on the off days, running it for months, or using it as a substitute for actual dietary change — it delivers the same disappointing results as every other crash diet.
If you need to lose weight fast for a specific reason and you’re healthy enough to handle a few days of strict restriction, it’s worth trying. Just go in knowing what it is: a short sprint, not a marathon.
What if I am unable to eat grapefruit?
You can just eat oranges. They have a similar effect.
Can I substitute steak for the tuna??
so half a grapefruit is equal to half an orange? I would actually be substituting Mandarine oranges so how many of those is equal to eating a half grapefruit?
Not exactly equal but similar. And about 1-2 mandarine oranges should be similar to a half of orange (depending on the size)
Is there a substitute for peanut butter…..I am highly allergic
You can try almond butter. It’s even better.
What if I don’t like broccoli??
Broccoli Substitute:
If you’re substituting out broccoli on the Military Diet, try and use a green or greenish vegetable like cauliflower, spinach, brussel sprouts or asparagus.
CAn you suggest a substitute for Saltine crackers as hard to find in UK shops
Saltine crackers:
Rice CakesRice cakes are a perfect substitute for saltine crackers. If you substitute saltine crackers for any other cracker, like gluten free, make sure you’re eating a similar amount of calories. Each saltine cracker has 13 calories.
Can you use fresh lemon juice to flavor the veggies, tuna, chicken, tea?
Yes you can 🙂
Can you have anything in tea?
You can put lemon.
Egg substitute?
you can eat some chicken (40g chicken ~ 1 large egg), but you won’t get all the nutrients that the egg has.
Can you squeeze lemon juice on the tuna and the vegetables?
Yes you can.
Is there a substitutes for the tuna and the cottage cheese?
you can try chicken. And for the cottage cheese there isn’t any unfortunately
I can’t eat cottage cheese or yogurt, suggestions?
Cottage Cheese substitute:
PLAIN Greek yogurt, ricotta cheese, cheddar cheese, eggs, or ham. Tofu is a non dairy substitute with similar nutrients.
I cannot drink coffee or tea is there any other in place of it….
You can drink plain water. But the effect on hunger won’t be the same.
What do you eat on the rest days? Because if you go back to normal foods you put the weight back on.
For the best results on the Military Diet, we advise following a diet of 1500 calories or less on your days off
what does the rest day implicates? does it means that can we go for our normal diet as before.
For the best results on the Military Diet, we advise following a diet of 1500 calories or less on your days off
one more question can i have my post and pre protein shakes folowig this diet plan
We advise following a diet of 1500 calories or less on your days off. That mean you can have on that days.
Is there a substitute for the hot dog
Hello Yanira,
Military Diet substitutes for hot dogs include turkey dogs, soy dogs, tofu dogs, bratwurst,luncheon meat, deli meat or baloney. For vegetarians, you can also substitute beans, lentils, or portobello mushrooms. Again, you can substitute another meat, but you don’t need to skimp on the fat with the hot dog substitute, as long as the calories are the same. There are about 250-300 calories in two plain hot dogs.
The lentils can b cooked any way ?
Yes Stephanie.
Are you supposed to drink anything on the days no beverage is listed?
Yes, you can drink water.
Can I add sugar to the tea and how much?
No you can’t add sugar.
Can we add organic honey ?
Yes you can.
What do u eat the4days ur not on the diet
For the best results on the Military Diet, we advise following a diet of 1500 calories or less on your days off
If I understand this correctly, you can eat normal the other 4 days?
For the best results on the Military Diet, we advise following a diet of 1500 calories or less on your days off
What can I have instead of hot dogs..I can’t eat them
Hello Debbie,
Military Diet substitutes for hot dogs include turkey dogs, soy dogs, tofu dogs, bratwurst,luncheon meat, deli meat or baloney. For vegetarians, you can also substitute beans, lentils, or portobello mushrooms. Again, you can substitute another meat, but you don’t need to skimp on the fat with the hot dog substitute, as long as the calories are the same. There are about 250-300 calories in two plain hot dogs.
What is 1/2 tuna?
1/2 pound tuna | 225 grams .
What exactly does it mean to rest for four days? No food? Or just eat regularly?
For the best results on the Military Diet, we advise following a diet of 1500 calories or less on your days off
what can you substitute the green beans with, I dont like them
Green Bean Substitute:
If you can’t eat green beans for any reason, substitute the same CALORIE amount of lettuce, tomatoes, spinach or any other green vegetable.
Thanks
Can you substitute any other vegetable for the green beans? I just dont like them
Hello Sandy, If you can’t eat green beans for any reason, substitute the same CALORIE amount of lettuce, tomatoes, spinach or any other green vegetable.
is tea and coffee suppose to be black and toast dry without bitter
is tea and coffee suppose to be black and is toast dry without butter
Hello M Power,
You can drink Green tea, and the toast is without butter.
Thanks
What can I substitute for the shrimp?
There is no shrimp in the diet.
I m vegetarian
Substitutes of meat
Hello Jainy,
If you’re vegetarian, you can use lentils, beans, tofu or portobello mushrooms as meat alternatives.
Thanks 🙂
Can i substitute the broccoli and any other veggie an just eat green beans in their place
Hello Devin,
If you’re substituting out broccoli on the Military Diet, try and use a green or greenish vegetable like cauliflower, spinach, brussel sprouts or asparagus.
Can you drink tea with each of the meals?
What kind of tea ?
I have a question about lunch of the 1st day, ½ tuna – how many gram is this?
Hello An,
That is 225 grams.
With this diet can you hit the gym with your normal training routine or will i get sick.?
If you exercise on the Military Diet, you can expect even better results. We recommend walking 30 minutes every day while you’re on the diet, that means 7 days a week! If you’re already on a cardio/weight lifting/circuit program before you start the diet, keep at it. But if your workout makes you feel dizzy or weak because of the low calorie count on the diet, something has to give. Slow down your exercise during the three days and try something more moderate. If you ever feel uncomfortable or weak, stop what you’re doing.
what are substitutes for the bread.. i eat no grain..
Hello Faye Jones,
In place of bread, you can eat 1/8 cup of sunflower seeds, 1/2 cup of whole grain cereal, 1/2 high protein bar, 1/4 cup of yogurt with 1/2 teaspoon of flax seeds. You can also use one tortilla or two rice cakes instead of bread.
I m a vegetarian
You need to try different diet.
Any kind of crackers?
Rice cakes are a perfect substitute for saltine crackers. If you substitute saltine crackers for any other cracker, like gluten free, make sure you’re eating a similar amount of calories. Each saltine cracker has 13 calories.
Substitute for ice Cream? dairy intolerance
Vanilla ice cream:
The vanilla ice cream in the Military Diet can be substituted for 1 cup of fruit flavored yogurt or apple juice. A good non dairy substitute is strawberry, vanilla or banana flavored almond milk. Do not substitute chocolate almond milk.
Is it ok to use seasonings on the meat, tuna and vegis
The only seasonings we recommend are zero calorie seasonings like salt, pepper, lemon juice and Mrs. Dash. Other no calorie seasonings include fresh garlic, ginger, cilantro, dill, cayenne pepper, red pepper flakes, curry, turmeric, cumin, sage and rosemary. VERY low calorie seasonings like mustard, Frank’s hot sauce and low sodium soy sauce can be used in tiny amounts. You can use garlic powder, but not garlic salt.
What can I eat in place of cottage cheese as this is a food I am not allowed to eat?! Also can you use Splenda and Lemon in your tea? Can you have garlic and lemon as a condiment for your meats?
PLAIN Greek yogurt, ricotta cheese, cheddar cheese, eggs, or ham. Tofu is a non dairy substitute with similar nutrients.
Yes you can use splenda and lemon in the tea.
Yes you can have garlic and lemon as a condiment for the meat.
Thanks 🙂
I do not like cottage cheese. Are there any substitutes for this and is the tuna canned tuna or fresh tuna?
PLAIN Greek yogurt, ricotta cheese, cheddar cheese, eggs, or ham. Tofu is a non dairy substitute with similar nutrients.
The tuna we prefer to be fresh. But if you are not able to buy, you can take and canned tuna.
Thanks 🙂
I do not eat fruits, how can I substitute the apple and the banana and also the peanut butter?
This is for peanut butter: if you have a peanut allergy or just don’t like peanut butter, you can substitute the same amount of almond butter, pumpkin butter, soy butter, sunflower seed butter, hummus or bean dip. Two tablespoons of plain sunflower seeds also work.
Apple Substitute:
Instead of apples, try plums, peaches, grapes, zucchini, pears or dried apricots.
Thanks 🙂
can i drink whey protein in between meals or in my pre and post workout?
For the best results on the Military Diet no you cant.., But on your days off you can drink why protein, but we advise following a diet of 1500 calories or less.
Hi. Thank you for this. What can i substitute for crackers if i don’t want to eat wheat or any other grain?
Thans ☺
Hi Jan, How are you today ? 🙂
Rice CakesRice cakes are a perfect substitute for saltine crackers. If you substitute saltine crackers for any other cracker, like gluten free, make sure you’re eating a similar amount of calories. Each saltine cracker has 13 calories.
How do I keep it off?
By following a healthy diet (no sugars, alcohol, too much bread). Eat lean meats, lots of vegetables and tea, coffee or water
I’m going to start Thursday. Good luck to me. I have 15 pounds to shed.
Happy you found it useful Alice. Be good to see how it helps you 🙂
What if i eat only a full apple and cup of lavazza coffee without sugar at breakfast, and broccoli only as dinner for those 3 days?
Broccoli 450g*
Any substitute for carrots? I just cant stand the taste
Do you use canned tuna?
Do you use canned tuna, if so how much? How much is 1.sluce of cheddar cheese, ounces or grams?
Do you have to take 4days off?
hi there, can i have any kind of snack between meals, tnx.
some medicines require NO grapefruit…is there a substitute ?
Hey, this is a great diet. I was looking for the 10 pounds BUT have achieved only 5 lbs for 3 days instead. I am very happy with that because I am not working out like the military boys do every day, so I expect less. To loose 5 lbs a week for 3 days of patients, is better than all the diets over the years attempted & makes me a happy guy, 20 libs. a month is just fine.
thanks again & I’ll let you know my final result.. I’m never hungry, but the tuna is a real struggle to get down so I’m super glad to a see all the alter natives . Thanks again.
jzpaznthru.
Can you put cream in your coffee
A little cream won’t hurt you. Unless you are drinking 5+ coffees a day 🙂
can you drink water all day
Yes you can
Hi. Can i drink sugar drinks with meals?
Actually, you need to try and drink only pure water or teas without sugar.
Are there non-daily alternatives for some of the days?
I’m afraid not. The plan should be used “as it is”
I started yesterday and am already feeling better bout myself, I walk with the diet and do sit ups, pulls up and push ups. feeling great . happy to have found this.
What is the daily calorie count on diet days? Also, can i still take my workout supplements when training days and diet days coincide? (BCAA’s, creatine, glutamine, and whey protein)
The calorie count is pretty low and we don’t recommend using this diet in combination with intense workouts.
Say thank you to admin. for answering all of your question and repetitively at that…especially when you can google most of the answers.
Can i eat shrimp instead of tuns?
You can eat other fish or anything that has a nutritional value similar to tuna.