Fat Fasting

Fat Fasting?  This is a concept I haven’t heard of, but I have seen some pretty amazing results on a few close friends, so I thought I would give it a whirl.  Luckily I got a friend on board too, so we are doing this together.  Our 5 day Fat Fast started Monday and we will end on Friday.    (I also wanted to make sure I did this when my daughter was away at sleepover camp since it is kinda psycho.  She watches EVERYTHING I do, and my son could care what I ate, or if I even ate at all.)

You basically eat straight up fat for 3-5 days straight to get your body in ketosis.   Ketosis simply means that your body is using fat for energy.  It is pretty restrictive, and usually used for people who are at a weight loss plateau, or people who are metabolically resistant.  I am not either, but I write a blog, so I have to try new stuff.  It’s in the job description.

Here are the details:

  • 1,000 calories per day
  • 90 percent of calories come from dietary fat
  • Eat five 200-calories “meals” every 3-4 hours

That may not sound like a lot of food and it’s not. The point of it is to get your body to burn stored fat in your body so when you start eating a controlled-carb diet you will continue losing weight.

I think my main concern is that  I would be ravenously hungry since you aren’t consuming very many calories or food.  But, the idea of dipping pork rinds in full fat sour cream is appealing to a food junkie.  However, getting in 90% fat has also been very hard, believe it or not!

Here’s what I ate day 1:

  • Coffee with 1/4 cup Heavy Cream
  • Atkins Dark Chocolate Royal Shake
  • 1 Cup of romaine, 12 mozzarella cheese balls, TBS olive oil
  • 1 ounce of macadamia nuts
  • 5 slices of bacon and two eggs cooked in bacon grease



 My fitness pal app looked pretty much like this.    I still lost 2.2 pounds the first day. My friend lost 3.1 pounds.   I was even over the 1,000 recommended calories.  I hit around 1,200 both days.

Here is what I ate day 2:

  • Coffee with 1/4 cup heavy cream
  • Atkins Dark Chocolate Royal Shake
  • 1 cup of spinach with 1 ounce each of roast beef, salami, turkey, bacon, and ham.   Topped it with pickles, (you need the salt!) tomatoes and oil and vinegar dressing.  (I was at Which Wich.)
  • 1 ounce of macadamia nuts
  • Fat Fast Mac and Cheese and the best green beans ever.


Results are in and I lost another 2.4 pounds yesterday.  I’m at 4.6 total.  In two days.  So far this is a crazy awesome way to lost weight.  But will it stay off?  Is this water weight?  I can’t help but be a little skeptical.    I’ll check in with you on Saturday and let you know my results as well as what I ate the other days.

Have you ever done a Fat Fast or something similar?






My friend and I even bought some ketone test strips.  The second day, Tuesday) we were already at moderate.



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12 thoughts on “Fat Fasting”

    1. Elise- I am by no means thinking this is a way to eat to live. I just thought I would give it a whirl for 5 days and see what happens!

  1. Do you know what ketoacidosis really is: a build-up of ketones that can change the pH of blood to dangerous levels; the results of which maybe permanent even if your diet isn’t.
    Atkins works the same way, and also causes acidosis. ShooGah 🙁 Reading about your minimalist clothing project was far more fun than reading about dangerously experimenting with your body!

    1. I am eating an appropriate level of carbohydrates (8-12% of daily intake), so there is no way I could go into ketoacidosis. I never eat grains, rice, or pasta anyway because of my Ulcerative Colitis. The main change in my diet is that I am lowering my protein levels. I used to eat 100-130 grams of protein daily. I am not a body builder, there is no reason for me to consume that much protein. I am enjoying the minimalist clothing project more than this too, by the way! 🙂

      1. Glad to hear Kacy! I was hoping you wouldn’t receive my comment in a negative context, because it was meant with the best of intentions. As instructors, we willingly or unwillingly become role models to our students. “A good teacher protects his pupils from his own influence.” Besides, you are strong and beautiful exactly the way you are & definitely don’t need to be on any kind of diet 🙂

        1. I’m glad you spoke your mind! I knew posting this that I would get some concerned readers, and that is okay. And thank you for your kind words! (And to be clear, this is not a diet I am on…simply a 5 day fast.)

    1. Me too Susan! This isn’t something you continue to do past 5 days, and I am guessing there will some weight gain at the end of the week. ?? We shall see!?!?!

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