Key takeaways
- The so-called military diet is a restrictive intermittent fasting eating plan that may promote short-term weight loss. Despite its name, this diet is not associated with the military.
- No research supports the claim that you can lose 10 pounds in 1 week on this diet. Any rapid weight loss is likely water weight from depleted glycogen stores, which returns quickly when you resume eating as usual.
- The military diet is not safe or sustainable for long-term weight management. Strict calorie restriction can lead to nutrient deficiencies, muscle or bone loss, and may promote disordered eating.
The military diet, also called the 3-day diet, is a short-term diet that claims to help you lose up to 10 pounds (lbs) (4.5 kilograms) in 1 week.
The diet plan involves a 3-day, calorie-restricted meal plan followed by 4 days off. Proponents advocate repeating the cycle for up to 1 month, or until you reach your weight loss goal.
However, no research supports its claimed benefits, and the severe nutritional restrictions it entails may cause health problems.
Keep reading to learn more about the military diet, a sample 3-day meal plan, and the potential benefits and risks.
The 3-day military diet is split into two phases over 7 days.
During the first phase, lasting 3 days, total calorie intake is between roughly 1,100 and 1,400 per day. This makes it a low calorie diet.
For the remaining 4 days of the week, the military diet encourages people to follow a 1,500-calorie diet.
It’s important to note that this level of calorie restriction falls below the general recommendation for adults, which is often around
Before making any drastic calorie restrictions, it’s important to speak with a healthcare professional. Not consuming enough calories, vitamins, or minerals may lead to a wide range of health issues.
The military diet provides a set meal plan for breakfast, lunch, and dinner for the first 3 days, without snacks between meals. Here’s a brief review of what a week on this diet looks like.
The 3-day meal plan
The 3-day meal plan for the military diet consists of 16 foods, divided into breakfast, lunch, and dinner.
The table below outlines the suggested 3-day military diet meal plan.
| Day 1 | Day 2 | Day 3 | |
|---|---|---|---|
| Breakfast | • 1/2 grapefruit • 1 toast • 2 tbsp peanut butter | • 1 egg • 1 toast • 1/2 banana | • 5 saltine crackers • 1 slice cheddar cheese • 1 apple |
| Lunch | • 1/2 cup tuna • 1 toast | • 1 cup cottage cheese • 1 hard-boiled egg • 5 saltine crackers | • 1 egg • 1 toast |
| Dinner | • 3 oz meat • 1 cup green beans • 1/2 banana • 1 apple • 1 cup vanilla ice cream | • 2 hot dogs (no bun) • 1 cup broccoli • 1/2 cup carrots • 1/2 banana • 1/2 cup vanilla ice cream | • 1 cup tuna • 1/2 banana • 1 cup vanilla ice cream |
The recommended amounts of these 16 foods decrease day by day. Your total calorie intake starts at 1,400 calories on the first day and falls to 1,100 calories on the third day.
The diet permits drinking water, herbal teas, and caffeinated coffee or tea twice per day with no sugar or creamers.
The remaining 4 days
There are no rules for the remaining 4 days of the diet aside from following a healthy eating pattern. However, a 1,500-calorie menu is provided for those hoping to accelerate their weight loss.
Keep in mind that eating 1,500 calories per day is still a calorie restriction that may not fit everybody’s energy needs. This is especially true if you lead an active lifestyle, which increases energy expenditure and calorie needs.
Additional permitted and “forbidden” foods
The military diet allows substitutions during the 3-day phase, as long as portions match the calorie count. These substitutions may be:
- gluten-free
- lactose-free
- vegetarian
- vegan
- allergy-free
The military diet emphasizes not substituting grapefruits for oranges. Instead, it advises replacing grapefruit with a glass of water with 1/2 teaspoon of baking soda. This is purported to help alkalinize your body and reduce body fat.
However, while some foods do increase your body’s acid load, the kidneys and lungs keep tight control on the acidity of the blood.
What’s more, animal-based protein foods, such as those permitted in the diet, tend to increase your body’s acidic load, making this recommendation contradictory.
Furthermore, there’s no evidence that baking soda reduces body fat.
There are currently no studies on the military diet.
Although a calorie deficit is generally required to achieve weight loss, the military diet doesn’t consider other factors that could affect weight loss,
- lifestyle habits
- underlying health conditions
- taking certain medications
- sleeping habits
- genetics
Additionally, proponents of the military diet claim that its specific food combinations increase metabolism and help burn fat. There’s no research to support these claims, except for caffeine, which may suppress hunger and aid weight loss.
The military diet became popular because proponents claimed that it could help you lose 10 lbs in 1 week.
However, most of this early weight loss will be due to water loss. That’s because severe calorie restrictions lead to a decline in the body’s glycogen stores — your body’s energy reserve.
When you eat sufficient calories, fluid accumulates easily. Consequently, when your glycogen stores are depleted, the related stored water is lost as well.
Once you return to eating regularly, you can easily regain any lost weight because your glycogen stores will replenish.
In short, no. The military diet doesn’t promote positive, long-term habit changes, and it is unnecessarily restrictive. Repeated cycles may lead to low energy or nutrient deficiencies.
The rigid, controlled nature of this diet could also promote an unhealthy relationship with food or a negative self-image. A 2026 study found an association between fad diets and:
- depression
- body shame
- disordered eating
Additionally, rapid weight loss poses risks. Losing too much weight too quickly
- vitamin and mineral deficiencies
- electrolyte imbalances
- a loss of muscle or bone tissue, in addition to fat
Instead, steady, gradual change can help with developing long-term habits that benefit people mentally and physically. The
- fruits and vegetables
- legumes, beans, and nuts
- whole grains
- protein, such as lean meats, poultry, and seafood
- low- or non-fat dairy
- healthy fats, such as olive oil or avocado oil
The amount of weight you lose on a 3-day military diet will vary for each person. Proponents of the diet claim you can lose up to 10 lbs. However, it’s important to note that this is likely mostly water weight rather than fat.
The military diet doesn’t explicitly mention foods to avoid. However, it does provide a shopping list of foods to eat during specific phases of the diet.
The military diet is a low calorie diet that proponents claim can cause weight loss. However, it’s an unbalanced and unsafe diet with no evidence supporting its use for long term, sustainable weight change.
Since most of the weight you’d lose on the military diet would be water weight, you’re likely to regain the weight quickly once you return to eating regularly.
If you’re looking for long-lasting results, focus on making healthy, sustainable dietary changes instead. Extreme or fad diets can harm your health.
Just one thing
Check out this article on evidence-based weight loss strategies for weight management. Be sure to talk with a medical professional before making any major dietary changes.