What is the 13-Day Metabolism Diet? Is It Healthy?

Also known as the “Royal Danish Hospital Diet”,  and “the Copenhagen Diet”, the 13-day Metabolism Diet is the latest fad diet to make its rounds on the Internet.

The diet not only helps you lose a significant amount of weight in a short amount of time, but it claims to change your body’s metabolism in less than two weeks. In addition, it claims that the changes in metabolism stay with you long after the diet, making it easier to lose weight.

the 13-day Metabolic Diet
the 13-day Metabolic Diet will definitely help you lose weight

You will lose weight under the 13-day plan (up to 22 pounds, it claims), but not because of a magical combination of foods; Rather, because of his strict caloric restrictions. As far as metabolism is concerned? Well, let’s just say we’re skeptical.

Here, we take a closer look at the 13-day metabolism diet and see if the plan lives up to the hype.

What is the 13-day metabolism diet?

Although the 13-day diet plan lasts less than two weeks, it is very strict and can be very hard to follow. The diet defines exactly what you will eat for the duration of the program. The exact details of the 13-day diet vary depending on who recommends it, but the many variations are clearly related. Here are some limitations you’ll probably find in the different versions of the 13-day diet.

  • No chewing gum
  • No alcohol
  • No cooking oil
  • No salad dressing
  • No sweeteners such as sugar and honey
  • No foods not listed on the metabolism diet plan
  • The diet does not allow substitutions. It recommends drinking plenty of water. Some iterations allow the use of salt and pepper; Others ban salt.

On the 13-day diet, what you eat for each meal is strictly prescribed. To give you an idea of what meals this diet includes, here’s a popular version of the diet.

The 13-day diet plan:

Day 1

  • Breakfast: Black coffee (always without sugar or milk)
  • Lunch: 2 boiled eggs and cooked spinach (where no amount is indicated on a meal, you can have as much as you like)
  • Dinner: Lean grilled steak

Day 2

  • Breakfast: Black coffee with butter wholemeal bread
  • Lunch: Ham (200g)
  • Dinner: Grilled lean steak, green salad (with salad and cucumber only) and quality fruit

Day 3

  • Breakfast: Black coffee and butter wholemeal bread
  • Lunch: 2 boiled eggs, tomato salad, and green beans
  • Dinner: 1 slice of ham and a green salad (cucumber and salad only)

Day 4

  • Breakfast: Black coffee and butter wholemeal bread
  • Lunch: Cooked or raw carrots with cheese
  • Dinner: Fruit salad (any fruit of your choice) and natural yoghurt

Day 5

  • Breakfast: Carrot (cooked or raw) with lemon and black coffee
  • Lunch: Grilled white fish with raw tomato
  • Dinner: Grilled steak and a green salad

Day 6

  • Breakfast: Black coffee and butter wholemeal bread
  • Lunch: 200g grilled chicken
  • Dinner: 2 boiled eggs with carrots

Day 7

  • Breakfast: Lemon tea
  • Lunch: Grilled steak and fruit
  • Dinner: Anything (even if it’s not on that list)!!!

Day 8

  • Breakfast: Black coffee
  • Lunch: 2 boiled eggs, boiled spinach
  • Dinner: 200g Grilled Steak

Day 9

  • Breakfast: Black coffee and butter wholemeal bread
  • Lunch: Grilled steak and a green salad
  • Dinner: 200g ham

10th day

  • Breakfast: Black coffee and butter wholemeal bread
  • Lunch: 2 boiled eggs, tomato salad, and green beans
  • Dinner: Ham and a green salad (cucumber and salad only)

Day 11

  • Breakfast: Black coffee and butter wholemeal bread
  • Lunch: Cooked or raw carrots with cheese
  • Dinner: Fruit salad and natural yoghurt

Day 12 and 13

  • Breakfast: Black coffee and butter wholemeal bread
  • Lunch: Tomato and grilled chicken
  • Dinner: 2 boiled eggs with carrots

Is the 13-day diet healthy?

The 13-day metabolism diet makes some bold claims, with little scientific evidence to support them. There are several red flags associated with this extreme weight-loss method. First, such massive weight loss in a short time seems unreasonable and unsustainable.

According to the Mayo Clinic, a typical recommendation for how much weight you should safely aim to lose 1 to 2 pounds per week is a typical recommendation. More than that, and you lose muscle besides fat, and it can make it more likely that you will regain the weight later (which can lead to serious health problems).

Second, the foods listed on the diet are limiting, making it difficult to get the full range of vitamins and nutrients your body needs to function properly. Some versions of the diet try to address this by recommending a supplement or multivitamin. However, vitamin pills cannot replace all the benefits and nutrients of a healthy diet (even recommended).

And although the diet sometimes claims names like the Royal Danish Hospital Diet, there is no real consensus about where this diet comes from or who developed it (it was most likely not developed by any hospital.) This means there is no guarantee of this has been developed by someone with a genuine understanding of diet, weight-loss and healthy living.

After all, overly strict diets like the 13-day metabolism diet can be very hard to follow and don’t lead you on the right path to a sustainable, healthy lifestyle. Erring is human, and the best diets are not diets at all; Rather, a good diet should be realistic and long-term and make it easier for you to live healthier every day.

Should I try the 13-day metabolism diet?

The 13-day metabolism diet technically works … but only for the 13 days. You’ll probably regain all the weight you’ve lost, and then some once you’ve finished the diet.

And although the diet claims to boost your metabolism, nutritionists and dietitians agree it’s much more likely to slow down your metabolism (as strong caloric restriction tends), meaning you’re Be worse after the diet is over when you start eating normally.

We strongly do not recommend the 13-day diet. Why torment yourself for 13 days to get even more weight after that? The diet lacks proper nutrition and can wreak havoc on your body, so you try irritable, moody and nutritionally.

If you still want to try this diet, we strongly recommend that it be monitored by a doctor to ensure safety.

Instead of relying on diets like the 13-day metabolism diet, try some basic following healthy life tips:

  • Increase your activity level.
  • Incorporate exercise (both cardio and strength training) into your life, three to six days a week
  • Drink plenty of water.
  • Eat lots of vegetables.
  • Don’t skip meals.
  • Reduce the amount of processed foods you eat.
  • Get enough sleep.
  • Learn to deal with stress.
  • Avoid eating out of boredom.
  • Pay attention to your portion sizes.
  • Pamper yourself now and then.

Simple enough, right?

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Fan of everything health and fitness related. My mission is to share my knowledge and experience with as many people as possible and help them to find their ideal path to perfect health.

5 thoughts on “What is the 13-Day Metabolism Diet? Is It Healthy?”

  1. I used to do this diet 3 years ago, and i lost around 10 kg. I stoped the diet after 14 days, no cheating at all, in the end of 2 weeks i had lost 6 kg, and in the end of the 3 week (after stoping diet) i had lost other 4 kg. Since then i have regained 7 kg (during 3 years), and i have been eating all i wanted to. I am trying it again since it had a wonderful effect on my body, i am on the 7th day. You feel tired and not energized during the diet, but it only lasts 2 weeks and its worth it.

  2. I am from Kenya Africa. Day 10 and loving the outcome. I feel exhausted but as soon as I eat, all goes very well. I have cut visibly a lot of weight. Feeling good.

  3. Can I take supplements or vitamins during the diet?I am an active person and scared that I might run out of energy?

    Can I have a cup of coffee whenever I feel hungry?


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