What Is the 13-Day Metabolism Diet Plan and What You Should Know


According to a study by Aarhus University, the 13-days diet plan is also known as The Royal Danish Hospital or Copenhagen hospital Diet. It is the latest fad diet that has been trending around the Internet.

It’s an extreme diet designed to help you lose 40 pounds in just about two weeks. The goal of this 13-days diet plan was to lose weight quickly as rapidly as possible, especially if they were obese and needed surgery. As a result, it was often referred to as the Danish hospital diet. Because operating on patients who are extremely overweight can be harmful, so this was diet created to help people lose weight quickly. Despite the fact that the Danish Diet included healthful meals, it was an extremely time-consuming way of losing weight.

The original Danish Diet meal plan is available for purchase on their website too. It is also quite similar to the Banting diet, which emphasizes high protein and low carbohydrate and sugar intake. The Danish Diet is a difficult diet to stick to, but it did result in rapid weight loss, as evidenced by the Danish Diet before and after photos.

The diet claims to change your body’s metabolism in less than two weeks, as well as helps you lose a considerable amount of weight in a short period of time. Furthermore, it claims that the changes in your metabolism last even after you stop dieting, making it simpler to lose weight in the future.

How Much Weight Can I Expect to Lose With the 13-Day Diet?

This is not a normal diet in which you regain weight after the fasting period. The 13-day diet, however, will boost your metabolism and help you maintain your weight once the diet is over.

The 13-day diet promises to help you lose weight (up to 40 pounds), but it’s not due to a magical combination of foods; rather, it’s due to its strict calorie limitations. But how about a boost in metabolism? Let’s just say we’re a little skeptical. If the diet is strictly followed, you should lose between 9–20 kg of excess body fat. This diet should only be followed for 13 days and no longer!

How does the 13-Day Metabolism Diet Work?

The goal of this diet is to reset your metabolism so that you can return to normal eating habits afterward. This isn’t a standard crash diet, but rather a diet plan that will help you change your metabolism and digestion over the course of 13 days. Because this is a very strict diet, everyone who follows it will lose the weight. The claims of drastic weight loss in a short amount of time are correct. However, until a person is fat, the health benefits are limited.

Rules To Follow For 13-Day Diet Plan

Although the 13-day diet plan is only for 13 days, it is very strict and can be challenging to stick to. The diet lays out exactly what you’ll be eating during the program. The particular details of the 13-day diet will differ depending on who is recommending it, but all the variations are closely related. The following are some of the restrictions you’ll find on different versions of the 13-day diet plan.

  • No alcohol
  • No cooking oils
  • No chewing gum
  • No sweeteners such as sugar or honey
  • Any kind of salad dressings
  • Any food that is not on the metabolism diet plan.

No replacements are permitted on the diet. It advises that you drink plenty of water. Salt and pepper are allowed in some versions, but not in all. Any food eaten in addition to the permitted foods will immediately stop the diet’s effect. You can start over again only after six months. If you can’t sustain the diet for more than 6 days (sticking to all dietary guidelines), quit and restart the diet after three months.

The 13-Day Diet Plan


Breakfast: Black coffee (Not sugar and milk)

Lunch: 2 boiled eggs and cooked spinach (as much as you want)

Dinner: Lean grilled steak with lettuce and celery


Breakfast: Black coffee with buttered whole wheat bread

Lunch: 1 large grilled steak with lettuce and fruits

Dinner: Grilled lean chicken fillet with a green salad (only lettuce and cucumber)


Breakfast: Black coffee and whole wheat bread with butter

Lunch: 2 boiled eggs with tomato salad and green beans

Dinner: 1 Chicken breast with a green salad (only cucumber and lettuce)


Breakfast: Black coffee and whole wheat bread with butter

Lunch: Raw or cooked grated carrots, with cottage cheese

Dinner: Fruit salad (any fruit) and plain yogurt


Breakfast: Raw or cooked grated carrots with lemon and black coffee

Lunch: Grilled salmon fish with tomatoes

Dinner: Grilled steak & green salad (lettuce and celery)


Breakfast: Black coffee and whole wheat bread with butter

Lunch: Grilled chicken with skin

Dinner: 2 boiled eggs with 1 big grated carrot


Breakfast: 1 cup of Lemon tea

Lunch: Grilled chicken

Dinner: Anything (if not even mentioned on this list)!!!


Breakfast: Black coffee with sugar

Lunch: 2 boiled eggs with spinach and tomatoes

Dinner: roasted beef with lettuce (seasoned with lemon juice and oil)


Breakfast:  Black coffee and whole wheat bread with butter

Lunch: Grilled steak & green salad (lettuce and celery)

Dinner: roasted beef with lettuce

DAY 10

Breakfast:  Black coffee and whole wheat bread with butter

Lunch: 2 boiled eggs with tomato and beans salad

Dinner: roasted beef with a green salad

DAY 11

Breakfast: Black coffee and whole wheat bread with butter

Lunch: raw or cooked carrots with cheese

Dinner: Natural yogurt with fruit salad

DAY 12

Breakfast: 1 big carrot

Lunch: steamed chicken with lemon juice with 1tsp added butter

Dinner: roasted beef with celery

DAY 13

Breakfast:   Black coffee and whole wheat bread with butter

Lunch: grilled chicken with skin and tomatoes

Dinner: 2 boiled eggs with raw carrots.

Download 13 days danish diet plan pdf.

Is the 13-Day Diet Plan Really Healthy for You?

Firstly, a rapid weight loss in such a short period of time is illogical and unsustainable. The Mayo Clinic recommends losing 1 to 2 pounds per week as a safe goal. If you lose any weight more than this, you’ll lose muscle as well as fat, making it more likely, that you’ll get it back later (which can cause serious health problems).

Secondly, the food restrictions in this diet plan make it impossible to receive the required range of vitamins and nutrients that your body needs to function correctly. Some variations of the diet recommend a supplement or multivitamin to help with this. However, vitamin tablets cannot replace all of the health advantages and nutrients that come from eating a natural balanced diet (nor do we recommend this.) People who prefer the traditional method of weight reduction still choose their finest compact elliptical as well as other in-house gym equipment.

And, due to the fact that the diet sometimes claims names such as the Royal Danish Hospital Diet, there is no clear consensus on where it originated or who established it (it is most certainly not developed by any hospital.) This surely indicates that there’s no guarantee it was created by someone who understands and has knowledge about nutrition, weight reduction, and good living.

Lastly, extreme diets like the 13-day diet might be difficult to stick to and do not set you on the way to a long-term, healthy lifestyle. The diets with restrictions aren’t diets at all; rather, they should be genuine, long-term, and make it a lot easier for you to live a day-to-day better and healthier life.

Is the 13-Day Diet Really Worth a Try?

If you look statistically, many people have found better results through the 13-Day Diet Plan. But, it’s only for a 13-day period. Once you have finished your 13-day period, your weight goes back to the same old times and you start gaining the extra pounds.

In fact, it can even mean that you may start eating more than your usual routine.

Although this diet aims to boost your metabolism, cleanse your system and take you on the healthy route, it can be otherwise as well. Dieticians agree that restricting your body of the important nutrients and the needed calories, your body can go into a diet shock. In other words, your body can overall reject the changes you tried hard for 13 days and you may begin overeating leading to weight gains.

For these reasons, going through a 13-day diet is not recommended at all. Why should you harm your body for 13 straight days with little to no sugar or salt and then suddenly try to give it sugar and salt non-stop along with other foods. This can as well leave you tired, exhausted and as well as you may experience mood swings.

And if still, you want to take a bold step and try out the diet, it is highly recommended that you consult a healthcare professional before embarking on this diet journey.

Is 13-Days Diet Plan A Starvation Diet?

We can say yes, as a study shown in the National center for Biotechnology information, women should intake 2000 calories per day and a minimum of 1500  or a bit fewer calories to reduce one pond per week. And for men average calories intake is 2500 and he can limit to 2000 to reduce 1 pond per week which is the healthiest way to reduce weight and maintain a healthy lifestyle.

Danish diet Plan limits its calories to almost 600 per day, which doesn’t provide the right amount of minerals, vitamins, nutrients, proteins, and good fats our body needs per day and that can lead to starvation and lack of energy.

Do Doctors Recommend 13-Day Diet Plan?

Because of the extreme effects, doctors today often hesitate to promote the Danish diet or advise that you to follow Danish diet menu. Sometimes it gets important to lose weight quickly, although aggressive diets are regarded to be unhealthy and here’s what some studies say about this type of diet:

  • According to research in Nutrients, Danish diet may not be an appropriate long-term eating plan as it is often deficient in iodine and vitamin D.
  • A study shows in Journal of Proteome Research, Danish diet plan has less long term weight loss effect as compared to New Nordic Die.

A research in The British Journal of Nutrition shows, as compared to rapid weight loss, gradual weight loss is healthier and often recommended by doctors.

13 day diet reviews-Is the Buzz Really True?

Some people are in favor of the 13-day diet, while others are against it. The best thing we can do is compare their opinions on an equal terms. Well, to be honest, there may be a few benefits to the 13-Day diet. First thing above all is its easy availability. You don’t need to sign up for anything or subscribe to anything. The foods that are part of the 13-day diet plan are simple to find at home or in your local shops. Secondly, the ideal 13-day diet plan is well-explained on numerous websites, so you should have no trouble following to their recommendations. Thirdly, this is a very strict plan that only allows for breakfast, lunch, and dinner—no supplementary snacks, diet pills, or nutritional supplements are allowed. It does away with the difficult process of counting calories, which many dieters find to be.

Despite these benefits, few people are able to locate a trustworthy source, such as the official website for the 13-day diet plan, that will accept responsibility or provide answers to dieters’ questions. This is the diet’s major drawback, which makes regular dieters doubtful about it.

According to the terms of the 13 Days diet plan, if the dieters are unable to follow it for 13 consecutive days, they must wait for a few days (between three and six months) before resuming the diet. Considering all of these factors, choosing to follow such a limited diet for oneself becomes quite confusing.

Many individuals claim that they significantly reduced their body weight in just 13 days. But if you don’t want to believe the 13 days diet plan reviews, and want to start any other fad diet, first talking to your doctor or dietician could be a good idea.

What are the other options apart from the 13-Day Diet Plan?

There are other healthy options other than the 13-day crash fad diet. You can opt for a healthy living lifestyle to keep your body healthy and maintain your overall weight.

  • Drink 2-3 liters of water daily
  • Eat plenty of green leafy vegetables
  • Do not skip meals
  • Move away from a sedentary lifestyle
  • Exercise daily with a combination of both the cardio and strength training
  • Avoid processed foods in your diet
  • Keep a close check on your food portions.
  • Avoid eating when bored
  • Keep healthy foods to nibble on (nuts, fruits, and veggies)
  • Manage your stress and anxiety levels
  • You need to sleep at least 7 hours at a minimum daily
  • Stay away from social media before going to bed

With social media being abuzz, it is very easy to be lured into the hypes of some of the popular diet plans. And if these diets are backed by social media influencers, it creates a bubble of excitement. Though these diets can help you lower your weight within the prescribed time (and a strict diet), your body can be prone to electrolyte abnormalities. If you are a heart patient, you have blood pressure issues, or have any other illnesses, it can adversely affect you.


Everyone is well aware of that reducing your calories intake helps you lose weight. This is exactly what the Danish Diet is based on.  However, when you examine the limitations of this plan, we have doubts about approving it. Moreover, since it only lasts for 13 days, this is not a long-term solution. As a result, after you return to a regular diet, you’re very likely to gain weight again.

Furthermore, we do not endorse any crash diets or any viral diets that are circulating on the internet. It is recommended to always consult your doctor before starting this plan. You need to make an informed decision that works best for your body goals, budget, and your genetic blueprint..

And if your goal is to lose weight, remember that being healthy is more important than gambling with your fitness.

Last but not the least, the best diet is the one that is balanced and fits your own lifestyle.

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