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What Is The Military Diet And Does It Work?

1st September 2020

1st September 2020

By Catherine Hargreaves

Another day, another diet trend. This time, die-hard dieters are taking inspiration from the military lifestyle. Designed for quick results and notoriously claiming 10 pounds of weight-loss in as little as a week, the military diet is definitely fast and furious. But what is it, and is it actually worth following? 

What is the military diet?

Despite being a diet trend of recent times, the military diet has actually been around for years. Some people claim that it was designed by nutritionists in the US military in order to get soldiers into shape at top speed, but the truth is that it isn't actually affiliated with any military or governmental institution.

With no prerequisite book or expensive foods necessary, the premise of the military diet is simple: significantly reduce your calorie intake for three days of the week, and eat ‘normally’ on the other four. For the first three days, you must follow a specific meal plan, comprising around 1,000 calories per day alongside unlimited tea and water. Once this half of the week has been completed, you’re allowed to eat ‘what you want’ to the tune of 1,500 calories a day (score!) for the next four days. Exercise is optional, but not essential.

What can I eat on the military diet?

Days 1 to 3 are prescribed for you, with replacement options available for dietary requirements, such as vegan and gluten free. If you’re able to eat everything though, Days 1 to 3 will look something like this for you:

Day 1:

Breakfast

  • ½  grapefruit
  • 1 slice of toast with 2 tablespoons of peanut butter
  • 1 cup of coffee or tea

Lunch

  • ½  cup of tuna
  • 1 slice of toast
  • 1 cup of coffee or tea

Dinner

  • 3 ounces of any type of meat
  • 1 cup of green beans
  • ½  banana
  • 1 small apple
  • 1 cup of vanilla ice cream

Day 2:

Breakfast

  • 1 egg
  • 1 slice of toast
  • ½  banana

Lunch

  • 1 cup of cottage cheese
  • 1 hard-boiled egg
  • 5 saltine crackers

Dinner

  • 2 hot dogs (without bun)
  • 1 cup of broccoli
  • ½  cup of carrots
  • ½  banana
  • ½ up vanilla ice cream

Day 3:

Breakfast

  • 5 saltine crackers
  • 1 slice (30g) of cheddar cheese
  • 1 small apple

Lunch

  • 1 hard-boiled egg
  • 1 slice of toast

Dinner

  • 1 cup of tuna
  • ½  banana
  • 1 cup of vanilla ice cream

Feeling satisfied? We aren’t so sure.

So how does the military diet work?

As with all forms of weight-loss, the military diet works by putting your body into a calorie deficit whereby you are burning more calories than you are taking in. This causes your body to break down fat for fuel once it runs through its energy which comes from food.

Even if you don’t do any exercise, the extremely low calorie intake in this diet will ensure that you’re most likely burning more than you’re eating – remember, your basal metabolic rate (BMR) ensures that you are burning anything from 1,300 to 1,800 calories a day just keeping your body alive and functional.

However – will you lose 10 pounds in a week? Almost definitely not, or at least not in the way you might hope. A pound of fat equates to roughly 3,500 calories burned, meaning you’d need to be in a calorie deficit of 35,000 for the week to lose 10 pounds of fat. That would equate to a deficit of 5,000 calories per day, meaning you’d need to be burning between 3,500 and 5,000 calories through exercise each day to stay on track. If you think this sounds unrealistic and restrictive, we’re with you.

What may happen is that you lose a significant amount of water weight. When your body stores carbohydrates it also stores water, so restricting your intake and reducing your body’s stores of carbs will likely shift the scales, without you having lost any fat.

Are there any benefits to the military diet?

Studies have shown that the most successful diets are those that can be maintained consistently. Arguably, incorporating four days of a slightly raised calorie intake, with a choice of nutrition at your disposal, may make the diet easier to follow than a stricter, full-time, seven-day schedule. However, the extent to which calories are reduced remains considerable compared to the recommended 1,800 – 2,500 calories per day (dependent on gender and level of activity). As such, many of us may find the diet difficult to keep up with.

What about the downsides to the military diet?

The military diet, whose website also names it the incredibly misleading ‘three day diet’ is a classic crash diet, designed to lose weight fast. However, as with all ‘quick fix’ diets, the weight lost (the majority of which will be water weight) is much more likely to come straight back on once you return to ‘normal’ eating. 

This is because intense periods of low-calorie consumption can wreak havoc with your hunger and satiety hormones, leading you to overeat without feeling full as your body, feeling starved, attempts to bring in as much nutrition again as possible. You may also experience more intense cravings for the foods you had previously ‘banned’, leading to further binging.

The verdict on the military diet

Whilst the military diet isn’t exactly dangerous, it is intensely restrictive, and thus unlikely to lead to long-term results. Also, thinking about fat and weight loss in this way isn’t all that mentally healthy either. Instead, we’d recommend a well-balanced diet which includes the occasional treat, to ensure neither mind nor body is feeling restricted. Pair this with the fundamentals of good sleep, regular exercise, and work-life balance, and you’ll be well on your way to feeling like your best self.

However, if weight-loss or fat-loss does happen to be a goal of yours, aim for a steady rate of maximum two pounds lost per week to ensure your body is still getting all of the vital nutrients it needs. And if you’d like a little help, why not check out the Innermost Weight-loss Range – three products designed to support the breakdown of fat for energy, boost your metabolic rate, and increase feelings of fullness to prevent unnecessary snacking. Purchase the entire range in our Weight-loss Collection bundle to save.

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Magnesium may help some people sleep better, but it is not a guaranteed solution for everyone. Its value sits more in supporting the body’s normal relaxation and recovery processes than acting like a direct sleep aid. A 2021 systematic review and meta-analysis published in BMC Complementary Medicine and Therapies looked at oral magnesium supplementation for insomnia in older adults. It found that magnesium may help reduce the time it takes to fall asleep. While the results were promising, the sample size was limited. Magnesium is most likely to be helpful when poor sleep is linked to factors such as low magnesium intake, stress, muscle tension, a busy nervous system or poor recovery. Someone who trains several times a week, works long days and struggles to wind down at night may find it more beneficial for sleep specifically than someone whose sleep issue is caused by an untreated medical condition, severe anxiety, chronic insomnia or an inconsistent sleep schedule. 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That might mean supporting your intake through a recovery-focused product, taking supplements with food, and using them consistently rather than expecting an instant effect. References  Magnesium. National Institute for Health Professionals. Click here. Jewett, E., Sharma, S (2023). Physiology, GABA. National Library of Medicine. Click here. Mah, J., Pitre, T (2021).Oral magnesium supplementation for insomnia in older adults: a Systematic Review & Meta-Analysis. BMC Complementary Medicine and Therapies. Click here. Read more
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A more varied intake of fibre tends to support a more diverse gut environment, which is linked to better resilience and function. For those looking to improve their training routines and hit new PBs, a well-functioning gut is central to recovery. This is because fibre supports the gut environment, which in turn affects how efficiently nutrients are absorbed. More stable energy levels When it comes to your energy, it isn’t just about calorie intake. It’s also key to ensure your body can effectively process these calories. This is where fibre can be highly beneficial. This is because fibre slows the digestion of other carbohydrates, leading to a more gradual release of glucose into the bloodstream. This helps avoid the sharp spikes and dips that can come from highly refined meals. Studies also show that diets higher in fibre are associated with improved glycaemic control, even in otherwise healthy individuals. In practical terms, this often leads to: More consistent energy across the day Fewer mid-afternoon crashes Reduced reliance on quick fixes like sugar or caffeine For those balancing work, training, and recovery, the more stable blood sugar levels provided by fibre mean more consistent energy availability. This can translate into better training sessions, particularly for longer or more demanding workouts. Appetite regulation High fibre foods tend to be more filling due to their volume and slower digestion. At the same time, they influence hormones involved in hunger and fullness, including ghrelin and peptide YY. There’s also a hormonal aspect to this. Fibre-rich foods can influence the release of satiety hormones, helping your body better recognise when it’s full. This creates a more sustainable approach to body composition. Instead of relying on weight loss restriction, your diet supports appetite regulation more naturally. Heart Health and Long-Term Outcomes In addition to the shorter-term health and wellness benefits, fibre intake also has a beneficial impact on long-term health. Soluble fibre, in particular, has been shown to help reduce LDL cholesterol by binding to cholesterol in the digestive system and aiding its removal. Large cohort studies have consistently linked higher fibre intake with a reduced risk of cardiovascular disease and type 2 diabetes. This is partly due to improved blood sugar regulation and partly due to the broader metabolic benefits of a fibre-rich diet. One study in particular by the BMJ found that each additional 7g of fibre per day was associated with a 9% reduction in cardiovascular disease risk. These outcomes aren’t immediate, but they reinforce the role of fibre as a long-term investment in health. High Fibre Diet Foods We’ve written about his previously (see here for our guide on high fibre foods) but in short, building a high fibre lifestyle doesn’t require a complete overhaul of your current diet. It’s instead about increasing variety and making more intentional choices within your existing routine. Below we have outlined some key foods that can help increase fibre intake. Whole grains Oats, brown rice, quinoa, and wholegrain bread provide a steady source of fibre while supporting sustained energy. They’re an easy upgrade from refined grains and tend to be more filling. Fruits and vegetables Eating more fruit and vegetable is one of the simplest ways to raise fibre intake. A useful approach is to focus on variety: Berries and apples for convenience Leafy greens for micronutrient density Root vegetables for more substantial meals Legumes Lentils, chickpeas, and beans are among the most fibre-dense foods available. They also provide plant-based protein, making them particularly useful in meals focused on satiety and recovery. Nuts and Seeds Chia seeds, flaxseeds, and almonds offer a concentrated source of fibre and can be added easily to meals. Even small additions, such as a tablespoon of seeds in a breakfast or smoothie, can make a difference over time. A Smarter Way to Think About Fibre Fibre doesn’t need to be treated as a standalone goal. It works best as part of a balanced, well-structured approach to nutrition - one that supports how you feel day to day, not just how you perform in the odd moment. For most people, that starts with whole foods. Building meals around plant variety, whole grains, and consistent habits. From there, the role of supplementation becomes more effective. The Innermost approach reflects that balance. Products like The Greens Blend can help support daily plant intake and micronutrients, while products such as The Lean Protein fit alongside a diet that prioritises both protein and fibre, rather than one at the expense of the other. Building a high fibre diet isn’t about adding or overhauling, instead It’s about making those small adjustments that bring more consistency to your routine. Over time, those shifts tend to have the biggest impact - not just on digestion, but on how your body feels, performs, and recovers. References Renolds, A., Mann, J., Cummings, J., Winter, N., MDiet, E., Morenga, L. (2019). Carbohydrate quality and human health: a series of systematic reviews and meta-analyses. The Lancet. 393 (10170), 434-445. Click here.  NHS UK. How to get more fibre into your diet. Click here.  Hullings, A., Sinha, R., Liao, L., Freedman, N., Graubard, B., Loftfield, E. (2020). Whole grain and dietary fiber intake and risk of colorectal cancer in the NIH-AARP Diet and Health Study cohort. The American Journal of Clinical Nutrition. 112 (3), 603-612. Click here. Threapleton, D., Greenwood, D., Evans, C., Cleghorn, C., Nykjaer, C., Woodhead, C., Cade, J., Gale, C., Burley, V. (2013). Dietary fibre intake and risk of cardiovascular disease: systematic review and meta-analysis. BMJ.347. Click here. Read more