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How Much Muscle Mass Can You Lose During a Water Fast?

How Much Muscle Mass Can You Lose During a Water Fast?

Most people in the water fasting community have no clue on how much muscle mass it’s actually possible to lose during a water fast.

At best, they can tell you that our bodies are very efficient at preserving our muscle mass during a water fast. But I have yet to meet anyone who knows the exact numbers.

In this article, I have relied on modern science to put an end to this confusion. If you read it all the way through, you will understand how much muscle mass you can expect to lose during a water fast (depending on how long you intend to fast).

But first, I want to quickly explain why we lose muscle mass during water fasting in the first place.

Why do we lose muscle mass during water fasting?

Some animals, like bears during winter hibernation, can survive without food for a very long time. And the amazing thing is, they can do it without any detectable loss of muscle mass [1].

Humans, on the other hand, we tend to lose a lot of muscle mass during starvation. Roughly put, that’s because our brains require some special “brain fuel” to survive [2].

Because we’re not eating any food during a water fast, our bodies have no choice but to start burning away some of our “structural protein” (to keep powering our hyper-intelligent brain).

Those structural proteins are the very basic building blocks of your muscles, which means you’re bound to destroy some of your muscle mass during a water fast.

Explaining all this in great detail would be beyond the scope of this article. So let’s just take a look at how much of those structural protein you can expect to lose during a water fast.

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The daily loss of structural protein on a water fast

In one starvation study [3], they measured the amount of protein obese people lost during a 21-day water fast.

I’ve adapted the data from that study into this daily protein loss chart:

Daily loss of structural protein during water fasting

    You can see that on the 1st day of the water fast (the first bar on the left), the loss of structural protein was the highest (69 grams).

    By the end of the 21-day fast (the last bar on the right), the loss of structural proteins was reduced by almost 80% (to 15 grams).

    This shows that our bodies can adapt to starvation extremely well. In order to keep you alive as long as possible, your body keeps slowing down the destruction of your vital body mass.

    But ultimately, you’ll lose much more muscle mass than this small amount of structural protein.

    Why?

    Because your muscle tissue is actually made of only about 20% of protein, while the rest of it is water [4].

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    The total loss of muscle mass on a 21-day water fast

    Here’s another chart I’ve created based on that 21-day starvation study:

    Total loss of vital body mass during water fasting

      This chart shows the total vital body mass you can expect to lose (in pounds), depending on how long you plan on fasting.

      If you plan to fast for 6 days (bottom axis), the chart can tell you that you could be losing a little over 6 pounds of your vital body mass (left axis).

      If you plan on doing a 13-day water fast, you could lose a little over 10 pounds of your vital body mass and a 21-day water fast could set you back by full 13 pounds of vital body mass.

      While this chart can tell you how much vital body mass you can expect to lose during a water fast, it can’t tell you how much total weight you can expect to get rid of.

      Maybe you already picked up on this, but I am no longer talking about muscle mass.

      Instead, I keep talking about your “vital body mass”, so let me quickly explain the difference between the two.

      You lose much more than just your muscle mass

      When it comes to understanding your final weight loss results after a water fast, things can easily get a bit confusing.

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      Just take a look at all the different kinds of weight you’ll end up losing if you decide to do a water fast.

      A breakdown of your final water fasting weight loss results

        At the highest level, you will be losing your body fat mass and your lean body mass (also called non-fat, or fat-free body mass).

        The lean body mass you lose will include some of your sodium and glycogen bound water weight, and some of your vital body mass.

        And finally, the vital body mass you lose will include more than just your muscle mass.

        Because some of those protein, the basic building blocks of your vital body mass, will also come from your vital organ tissue [5].

        And what’s the biggest problem when it comes to destroying the basic building blocks of both your muscles and vital organs?

        Remember, the most important muscle and vital organ in your body that could suffer because of this, is your heart.

        I won’t get into more detail here, but you can read all about the health dangers of water fasting here).

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        Now, let’s look at some of the things you can do to avoid losing your vital body mass while fasting.

        How to prevent the loss of muscle mass during fasting?

        The most obvious solution to avoid the destruction of your vital body mass is not to do a fast in the first place. If you were considering doing a water fast for weight loss, you can simply go with any of the countless less restrictive diets out there.

        Just make sure to do your research, because not all weight loss diets are designed to protect your vital body mass.

        But if you’re still interested in going through with a water fast, at least consider looking into intermittent fasting, alternate day fasting, or even muscle sparing fasting as safer alternatives to water fasting.

        Muscle sparing fasting, for one, can actually be done without any solid food and can give you that “pure” feeling of fasting (while still helping you avoid that unnecessary destruction of your vital body mass).

        My goal for this article was to help you understand water fasting is no fairy tale. Knowing that you could actually destroy up to 13 pounds of muscle mass AND vital organ tissue (on a 21-day water fast), you’re hopefully going to at least consider the alternatives.

        Now, I want to ask a small favor of you. If you know absolutely anyone who has ever done, or has at least considered doing a water fast, please share this article with them.

        Don’t do it for me, or even for yourself. Do it for them and for their safety.

        Featured photo credit: Pixabay – 926663 via pixabay.com

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        Last Updated on July 5, 2019

        5 Reasons Why You Should Always Be Yourself

        5 Reasons Why You Should Always Be Yourself

        When it comes to being yourself, there can be a lot of pressure from the outside world as it tries to influence who you are. Living in a society that is constantly developing, it’s important for you to always be yourself from the inside out. When you deeply know yourself and the boundaries that you have set, you are more likely to experience a fulfilling and rewarding life. Without knowing yourself and establishing those boundaries, you can easily be pushed around and end up on a dirt path.

        “Enter through the narrow gate. For wide is the gate and broad is the road that leads to destruction, and many enter through it. But small is the gate and narrow the road that leads to life, and only a few find it” – Matthew 7:13-14

        You have the option of taking the path that is broad or taking the path that is narrow. You can either conform to what life wants you to be, or have the courage to remain true to yourself throughout the years. It’s definitely a challenge to have a strong sense of self when we are constantly getting distracted and being influenced by the media and society’s way of life. But if you want to reach your fullest potential in life, it all starts with being yourself.

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        Why should you always be yourself?

        Because you will:

        1. Live in alignment with your values and beliefs. Being yourself is all about knowing what you believe in and the values that you live by. When you are not yourself, you will take on the values and beliefs of others. This is when you start conforming to other people’s expectations and way of thinking. When you know your values and why you do what you do, you will live according to your own values and beliefs.
        2. Establish your own identity. When you are able to have a solid foundation of being you, you are establishing your own sense of identity. No matter what happens in your life, you will always know who you are. There will be times where you may feel lost or distracted, but if you have your own identity you’ll be able to get back on the right path. Without establishing your own identity, you may easily conform and lose yourself.
        3. Build courage. It takes a great amount of courage when you decide to take the path that goes against the crowd. The reason why the majority of people take the broad path is because it’s easy. It’s easy to just follow the crowd. It’s more of a challenge when you stay true to yourself and establish your own identity. This challenge of always being yourself takes courage and inner strength. No matter what comes your way, you’ll know how to handle it.
        4. Establish boundaries. When you are always yourself, you know what your limits are and the boundaries that you have set for yourself. When people cross your boundaries, you will know. But if you don’t establish boundaries, people may very well walk all over you and take advantage of you. If you are always yourself and you establish boundaries, you are more likely to be aware when people start taking advantage of you. Create and establish your boundaries.
        5. Find focus and direction. When you are always yourself, you are more likely to have focus and direction in your life. Imagine someone who is constantly conforming to other people’s expectations. Do you think this person has focus and direction? I don’t think so. When you stay true to who you are, you are more likely to know the goals you want to accomplish and how to go about accomplishing them. You are able to stay focused and know which direction to take in order for you to accomplish your goals.

        No matter what you experience in life, the only person that will always remain constant is you.

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        Featured photo credit: María Victoria Heredia Reyes via unsplash.com

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