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Using the Fat Fasting Technique

Using the Fat Fasting Technique

Updated Sep 30th, 2022 – Written by Craig Clarke, Founder & Keto Diet Practitioner

Medical review by Dr. Sarah Neidler, PhD

The fat fast is a technique brought by Dr. Atkins’ New Diet Revolution – used by people who are metabolically resistant and have trouble with their induction. Let me first say that fat fasting should be used in 2 situations and 2 situations only:

  • Breaking through a 2 week or longer plateau.
  • Inducing yourself into ketosis quicker, whether you are just starting keto or you had a cheat day.

It is important to stress that a fat fast should only be followed for a few days maximum as it does not provide sufficient protein and other nutrients. It is also not recommended when you are very slim and don’t have significant fat stores.

To be clear: You should not fat fast consistently. It is only for people starting a ketogenic diet and want to be inducted into ketosis faster, or for people that are on a long (2 weeks or more) plateau.


Understanding the Fat Fast

The lack of carbohydrates and protein will allow your body to depreciate your glycogen stores quicker, also allowing your body to go after the fat stores, like we want it to, to use as fuel.

Fat fasting will force the body to undergo lipolysis so that it burns up fat that is stored in the body.

Lipolysis is a process involved in the breakdown of fats, converting triglycerides into glycerol and free fatty acids. The longer you fast, the more of these free fatty acids will be released. Why is this important? Well, fatty acids are used by the liver to create small amounts of ketone bodies and used as fuel.

Lipolysis cannot happen if there is a significant amount of glucose coming in, but since 80% – 90% of what you will be eating are fats, you don’t need to worry about excess protein or carbs converting into glucose.


What is Fat Fasting?

Fat fast infographic: 1000-1200 calories from snacks and coffee for 2-4 days with expected 5-8 pound loss

So, what exactly is a fat fast? It’s eating between 1000 and 1200 calories a day, where between 80% and 90% of your calories come from fat, and fat alone. You break these 1000-1200 calories into 4 or 5 meals a day, eating in blocks of 200-250 calories per meal.

It is normally done for 2-4 days but is never recommended to go for more than 5 days. Going longer than this will start to put your body in a real “starvation mode” and your muscle mass will begin to be metabolized as energy at a faster rate – the exact opposite of what you want.

Hungry? You most likely will be at first, but once your body starts adapting to the way you are eating, you will notice a drop in your hunger. This is because you will be eating your meals in frequent intervals with high amounts of fat, which increases satiety levels.

If you’re doing a fat fast, I recommend doing a 3 day fast. This normally drops about 5-8 pounds of body fat and water weight. When you enter back into a normal diet, expect to put back 2-3 pounds of that weight.


Should You Do a Fat Fast? The Potential Benefits

The fat fasting technique is essentially an accelerated version of the keto diet. This is because it requires you to restrict calories, carbs, and protein to lower levels than you would with a long-term ketogenic approach.

By eating in this way for a few days, you can speed up the pace of experiencing the benefits of keto, including:

  • Rapid weight loss. The combination of carb and calorie restriction usually leads to a weight loss of 1-2 pounds per day (of body fat + water weight).
  • Breaking through weight loss plateaus. If you have been experiencing a weight loss stall for two weeks or longer, following a fat fast may be an effective strategy. To learn more about how to bust through plateaus on keto, follow this link.
  • Increasing ketone levels. Whether you are transitioning into ketosis or trying to achieve deeper levels of ketosis, fat fasting is one of the fastest ways to do this.

However, as with other highly restrictive weight loss approaches, the fat fast can come with a few downsides as well. This is why it is not recommended nor sustainable for long-term dieting.


What are the Side Effects? Fat Fast Drawbacks

Along with the potential for rapid weight loss and ketosis, the fat fast can come with a few side effects. The most common drawback is called the “keto flu” — a collection of flu-like symptoms that we may experience as we adapt to the keto diet.

Fortunately, there are a few simple ways to remedy these symptoms, such as maintaining proper hydration, increasing electrolyte intake, and taking MCT oil. To learn more about the keto flu and how to avoid it, follow this link.

Other than the keto flu, the fat fasting technique can also cause rapid fluctuations in blood sugar, blood pressure, hormones, and weight. For this reason, it is best for anyone who has diabetes, heart disease, endocrine-related issues, or an eating disorder to consult with their healthcare practitioner before implementing a fat fast.


What to Eat

So let’s get to it. What should you be eating? That’s up to you.

There’s not all that much choice you have, as you have to keep the calories relatively low and the fat very high. Try to aim for foods that are almost pure fat: avocado, macadamia nuts, cream cheese, fat bombs.

Feel free to mix meat in there, but be careful about the amount of meat you actually eat. As most of it will have a good amount of protein, you want to be sparing.

Chicken, tuna, turkey, bacon, prosciutto, etc. will be a nice addition to get a bit of protein in your system and add some extra flavor to your dishes.

Illustrated woman thinking about fat fast foods including avocados, coffee, and a chocolate fat bomb

Below, you can see some options for single meals:

  • 2 tablespoons of Raw Coconut Butter (this is blended coconut meat, not the same as coconut oil)
  • 1 serving of Spiced Bacon Deviled Eggs
  • 1-2 servings of your favorite Fat Bomb
  • 1 serving of Cheesy Creamed Spinach
  • 1 serving of Egg Salad Stuffed Avocado
  • ½ medium avocado mashed with 1 tbsp. of mayonnaise (home-made if possible)
  • 2 oz of mackerel, salmon or sardines (cooked or tinned) mashed with 2 tbsp. mayo (serve on 1-2 small lettuce leaves to make keto-friendly fish tacos)
  • ½ serving of Keto Mocha Mousse
  • 1 cup of Keto Proof Coffee
  • ½ cup of Iced Ketoproof Green Tea
  • 1 oz. Macadamia Nuts
  • Macadamia nut butter with 2 oz. cream cheese
  • 1 oz. chicken with 2 tbsp. mayonnaise
  • 2 egg yolks with 1 tbsp. mayonnaise
  • 1 cup Coffee with ¼ cup heavy cream
  • 4 slices bacon (be careful with this, as it dwindles under 80% calories from fat)
  • ¼ cup heavy cream whipped with Da Vinci Flavored Syrup
  • 2 oz. sour cream with ½ cup cucumber
  • ½ serving of sugar-free Jell-O with ½ cup whipped cream

Three Day Fat Fasting Meal Plan For Keto

Day 1

Day 1 Macronutrient Breakdown

  • Total Calories: 1,076
  • Total Carbs: 10.98 g
  • Net Carbs: 6.54 g
  • Total Protein: 30.76 g
  • Toal Fat: 102.59 g
  • Percentage of Calories from Fat: 85.8%

Day 2

Day 2 Macronutrient Breakdown

  • Total Calories: 1,036.95
  • Total Carbs: 17.39 g
  • Net Carbs:  10.79 g
  • Total Protein: 21.21 g
  • Toal Fat: 100.1 g
  • Percentage of Calories from Fat: 86.9%

Day 3

Day 3 Macronutrient Breakdown

  • Total Calories: 1,196.68
  • Total Carbs: 17.04 g
  • Net Carbs: 12.02 g
  • Total Protein: 40.33 g
  • Toal Fat: 110.39 g
  • Percentage of Calories from Fat: 83%

How to Implement The 3 Day Fat Fasting Meal Plan

By making the recipes in this meal plan, you’ll have plenty of extra servings that you can use to kick-start your regular ketogenic diet or extend your fat fast for another day or two. Feel free to substitute any fat bomb recipes for the fat bombs recommended in this meal plan (you can find some more fat bomb ideas here).

If you would rather keep your fat fast as easy as possible, then simply pick a couple suggestions from the list of suggestions above and eat between 1000 and 1200 calories of them during your fat fast. Just make sure you are getting 80- 90% of your calories coming from fat. You’ll find the perfect example of how to keep your fat fast as simple as possible below — no need for fat fasting meal plans or food prep.

Illustrated calendar page showing 3 days with a pink starburst background


Making It Easy

If you’re unlike me and just love cream cheese, then you can snack on a full 8 oz. block of cream cheese for the day along with a cup of coffee with 2 1/2 tbsp. coconut oil in the morning.

A block of cream cheese with a ketoproof coffee is one of the best ways to do a fat fast, as it is:

  • 1020 Calories
  • 97g fat (86% calories from fat for the day)
  • 8g Carbs (3% calories from carbs for the day)
  • 16g Protein (6% calories from protein for the day)
  • Easy – one of the most important factors.

How to make a fat fast easy.


Key Takeaways for a Successful Fat Fast: Quick FAQs

Let’s trim the fat from the fat fast technique with these simple questions and answers. For more detail, scroll back up to the relevant section or click the links provided.

Who is the Fat Fast Helpful For?

Anyone who is looking to:

  • Enter deeper levels of ketosis quickly
  • Break their long-term weight loss stall

What are the Benefits and Side Effects?

The benefits include rapid weight loss and significantly higher ketone levels. The primary side effect is the keto flu (which you can learn how to remedy in our keto flu guide).

Who Shouldn’t Implement a Fat Fast?

Anyone with the following conditions should consult their healthcare practitioner before trying a fat fast:

  • Diabetes (type 1 or type 2)
  • Heart disease
  • An endocrine-related condition
  • An eating disorder

How Do I Follow a Fat Fast?

Follow these three rules:

  1. Eat around 1000 to 1200 calories a day
  2. 80-90% of those calories should come from fat
  3. Consume 4-5 meals a day with roughly 200-250 calories in each meal

For some fat fast meal ideas, check out the keto recipes and foods listed above.

What Should I Do After the Fat Fast?

The best way to maintain and build on your weight loss results is by following a sustainable and healthy diet for you.

To learn more, read through our guide to maintaining keto results for life.

Sources:

Comments

  1. Let me know how it’s going! 🙂

  2. Sounds good 😀

  3. Carbs should be skipped altogether and the emphasis of keeping protein low is because it’s breaks down into amino acids (of course) but then as much as half can be converted to glucose. Think about this, if you eat the frequent meals as suggested your body is getting its energy from food and not your stored adipose tissue. Best to eat within an 8 hour period and even better to get down to 2 meals skipping the one meal that’s easiest for you. The starvation mode is hogwash, a total myth, it takes months for that to happen, as well as any marked atrophy. You can also slow that process down with resistance training of any kind.

  4. foxymoron says

    I cannot believe it! I had many yummy treats On Saturday 5/22. Started my fat fast on Sunday evening, and by Monday morning KETOSIS! Thank you so much Craig, for all your hard work and the GREAT recipes, advice and encouragement!

  5. Gramgram3 says

    I have been on the keto diet for 7 days. 3 days ago I started doing the keto proof coffee in the morning and then not eating until about 2 p.m. I am still not in ketosis. Is there something that I can do to start this thank you. I am eating a very small amount of carbs and protein so I’m doing the ratio as recommended. Thank you

    • I’d suggest using the keto calculator to make sure that your macros are on point. Track for a few weeks and as long as you’re eating properly, you should be in keotsis within 5 days.

  6. I want to start the fat fast…one problem I do not like cream cheese or cottage cheese…. any substitutions?

  7. I try to go after cream cheese that has 1g carbs per 1 oz. Usually Organic Valley brand, as most cream cheese nowadays has 2g carbs per 1 oz.

  8. Hi, while doing the fat fast is cold coffee with heavy cream acceptable? I do not want anything to offset my results. Thanks!

  9. Is only this you can eat in 3 days??

  10. Trish Ricks says

    When you do the fat fast are you actually going into ketosis or is the measurement of ketones skewed because the high amounts of fat? Where as the ketones are produced from the body burning the fats you are ingesting aposed to the stored fat or. Your body? I don’t known if I asked that correctly or if my question is clear if not please let me know so I can possibly reword it to get an answer to my concern.

    • You do actually go into ketosis, it’s just faster because you’re depriving yourself of other nutrients. That’s one of the main reasons I don’t suggest it for more than 3 days.

      • Trish Ricks says

        Thanks so much for the quick reply Craig! Thanks for reiterating no more than 3 days because it’s such an easy thing to do it would be easy to do it longer than you should! But I will definitely stop after today!!! And go to the macros recommend for myself.

  11. Kaitlyn Eves says

    Hello, I’ve been on KETO for 179 days (almost 7 months).. down 57.2 lbs. Problems is that since the end of May I’ve been loosing very little and in the past 3 weeks.. lost nothing. I haven’t gained but I’m most discouraged. I’m now at 226, I stick very close to my macros. I was told to carb up one day so I ate a pile of strawberries.. then found out that I shouldn’t have because fruit stores in the liver and I have a fatty liver. OMG!!! I’m worried about doing 3 days of entire fat as I have issues with elimination.. cream cheese especially.. even though I love it. Would appreciate hearing back, thx so much.. I’m so glad I came across your blog, ty ~k

  12. Rima Jones says

    Hello there
    I really need some help. For the past 5 months I’ve been trying a range of diets. Most recently the Cambridge which consists of getting your body into Ketosis but through really terrible fake bars and shakes. No more than 500 calories a day.
    The past 2 months I’ve tried pure keto with food and have lost 20 pounds however have hit a complete stall and have been plateau for 2 months despite running daily and eating less that 20g carbs per day. I really want to try fat fasting but cannot stand creme cheese, therefore can you pls suggest another way? Perhaps avocado? Can I eat these all day and get into it? Happy to do the bullet coffee and nuts too but just need to guidance.

    Thanks so much

  13. So…just a little question i guess…the cream cheese and coffee w/ coconut oil…would it mess with it too much if i ate 3-5 toasted pepperoni slices with the cream cheese 3 times? Or would that throw this idea completly out of whack?…ive been stuck for 3 weeks for my wieght loss….its been only 10lbs of wieght gone in 2.5 months….love the food…just rather slow in progress.

  14. Elina Kaufman says

    Hi Craig, would it be okay (if I’m going the “easy” route) to drink bulletproof coffee with butter instead of coconut oil? I buy the bulletproof coffee from the actual Bulletproof coffee place in Los Angeles, where they make it with grass fed butter and brain octane. Just wanted to check. 🙂 Also, what about electrolytes during the fat fast? Can I drink this maybe to help with feeling lightheaded, etc.: http://ketodietapp.com/Blog… ?

    • Yeah of course – the “brain octane” is just MCT Oil. Feel free to add that in when you make it at home 🙂

      You can also drink the electrolyte drink if you find yourself feeling foggy or the keto-flu coming on.

  15. Eduardo Love says

    Craig – you are the man!

    I did Keto for a month straight…. pretty strictly. I used a Keto calculator & MyFitnessPal. Thing is – I didn’t see the results I was “hoping” to see. I had a weekend at a music festival and caved. I had beer, crazy food, and just threw out that hard work. I didn’t enjoy that but I am using that attempt as a lesson to fuel the next venture. The shift needs to be a lifestyle one.

    My dream and goal is to have lose the belly fat I’ve carried around with me since my youth. I’m not really fat in the face or anywhere else except for the belly and chest… I am 5’11” and weight 195.

    I’m on day 2 of the cream cheese bullet proof diet and i’m feeling the motivation intensify. I knew my dreams weren’t being met by slacking off… and this diet seems to be the most promising.

    My questions are:

    If I eat all my calories in the morning – will my body have an excess of protein and turn it into glucose?

    Is Intermittent Fasting recommended for Keto Diet?

    How much protein in “too much” protein in one sitting?

    Will Powerade Zero knock me out of Ketosis?

    Thanks a million for your expertise!

    <3

    • Thanks man! Your body will be fine for those few days. But you certainly don’t want to fat fast long, especially when working out. It’s recommended for fat loss, but not required. Too much protein is considered over 35g or so in 1 sitting. Powerade Zero is great – it shouldn’t knock you out of ketosis. I drink them pretty regularly for electrolytes.

  16. Eduardo Love says

    What do you think about intermittent fasting and keto?

  17. 5 carbs for the day and almost 1600 calories..? Wow. I would love to see what you ate.

  18. Debby Mia Rogers says

    Hi I was just wondering as I am new to this and need it to work. But I noticed in the food list it mentions squash but not pumpkin. Is pumpkin allowed or not

  19. Erika Gravato says

    You should update this article. A block of cream cheese is 16 carbs. It’s 2 carbs per ounce.

  20. Yes, it’s a fat so 8oz. cream cheese adds up in calories quick. Remember this is only to be used for a few days at the max.

  21. Dongfang Nangong says

    This is an awesome sharing!! Thanks very much! I am quite pissed at my cheating day. Well, it happens once a while. I need really work on that!

  22. Can you workout on the fat fast? For example I workout 4-6 days a week. Burning between 750-1200 calories. Workout usually are about 2 hours long including 10 min in the sauna.

  23. Yes – you could do that. Just watch out for the carb and protein counts on almonds as they aren’t the best nut for fat fasting.

  24. Hi!
    Is this fine to do with IF?
    I’m Leangains fasting so I eat between 12 and 8 and only eat twice a day so is this still going to work if I just split this into 2 meals? I usually have a full black coffee to maintain the fast and suppress hunger at 8 will another coffee at 12 with cream be fine with the cream cheese (I’ll probably add Metwurst or chicken to help with eating that much cream cheese) and can you help with recommended intake if I do this?
    Thanks. 😊

    • Sorry for the late reply – it is fine to do with IF but I wouldn’t recommend doing a fat fast if you’re doing leangains as well. You should be depleting your glycogen stores well if you’re lifting so there shouldn’t be a need for a fat fast.

  25. So I eat cream cheese all day with coffee and coconut oil (or MCT oil) everyday for three days?

  26. I am just looking into Keto and have yet to start I have been gaining weight and eating everything in sight. I would like to get a jump start and think the fat fast may be a great way to do that. I have a few questions if I don’t drink coffee but still need caffeine (diet coke drinker) would you suggest tea with coconut oil to substitute? Also as for what to drink while on it is it necessary to drink a lot of water? Do I need something with added electrolytes? I would like to go for three days next week once I am finished with that do you have a suggestion of what to eat after? Do I slowly increase carbs back? Stick to them very low? I have so many question. Any information would be great. Thank you I think this website is wonderful and very informative!

    • Hey Amanda: Tea would do the job, and I recommend it as it has a lot of health benefits (black or green). You do need to drink extra water as keto is a natural diuretic (makes you pee more). I recommend around a gallon a day or as close as you can get to that. For electrolytes, you can either supplement or add in a Powerade Zero to your daily intake.

      I recommend sticking to keto, just using the fat fast as a kickstart.

  27. Okay, this probably seems really stupid, but what can I do. In the list above (beginning with 1 oz. macadamia nuts) it says that these are suggestions for “single meals.” So please elaborate: am I correct in assuming that each bulleted item is a “single meal”? Not that all these together constitute a “single meal”? Next question (which I don’t see an answer to anywhere): how many of these meals are we supposed to eat each day? BTW, I’ve lost >70 pounds on a low-carb diet but have been stuck for more than 6 months.

    • Yes, they are examples of single meals. You can add any of them up to get your 1k calories a day. Remember that I don’t really recommend going past 3 days of a fat fast – it should just help kickstart the weight loss again.

      • Thanks. I figured it out myself within minutes after pposting but couldn’t figure out how to retract it, so I left it there to provide comic relief for other subsctibers. 😉

  28. Gala Hemphill says

    I do 30 m of strength training MWF and moderate cardio TThS. Is this ok while on fat fast and regular ketogenic diet?

  29. Hi!! just to be clear, you only ate cream cheese and the coffee for the entire day?

  30. Rebecca Wallace says

    Sorry, if this has been asked before, but what were the macros for your cream cheese? The ones I’ve seen look like it would be too many carbs or protein… Thanks!

    Also, wondering if you should be active during these days?

    • I wouldn’t recommend being active as you’re intaking very few calories. As far as cream cheese, many brands have changed recipes. There’s a few brands that are still 1g net carb per serving (usually organic), but most have changed to 2g. They should still be within ranges for a fat fast still.

    • I would differ from Craig just a little bit in that I would exercise caution, ha ha, not because of the calories thing but because of the protein thing. You’re getting barely any of that for those three days. If you are using the fat fast to break a stall and you find your energy levels are good then maybe go for a walk daily. Drink to thirst, don’t push too hard, play it by ear. Anything that’s meant to increase muscle mass is not going to work very well during this time though.

      One thing people forget or never knew on the caloric-intake question is that whenever we intake calories we meet immediate energy needs and store the rest. Then between meals we burn from what we stored. In a normal body. Now if someone’s body has decided it must gain fat stores then it’ll lock your fat stores and the only time you’ll have energy is if you’re eating… which is why people gaining weight keep eating.

      Conversely, when you’re in proper fat-burning mode, that stuff in your fat cells was never used for energy by your body. So when you’re pulling it out and finally burning it, THAT COUNTS AS CALORIC INTAKE.

      So in theory if you weren’t going to lose muscle mass from pushing too hard and if you were already in ketosis and fat-adapted I’d say knock yourself out as long as your body responds well. But there’s still that protein problem. Soooo I think a three-day break from most activity is not unreasonable.

  31. roseerose10 says

    Hi! Just wondering if you ate one block of cream cheese for the whole day, or if you ate multiple blocks of cream cheese for one day?

  32. Bacon has too much protein, your body will eat the protein for fuel instead of eating the fat. Don’t cook the bacon to crispness but only enough that it is still floppy.

  33. Can i replace other ingredient to do fat fasting if i fill my calories 90% of fat ?
    Like meat to oily fish
    Cause i think fat metabolism is not good
    Although i ate cab under 20g for 15days, i have no lose weight

  34. Donna Hughes says

    Will vodka and the Atkins bars keep me out of ketosis. I can only get to trace or a little above..help

    • Atkins bars may knock out out of ketosis, but vodka shouldn’t. Though, alcohol in general will slow weight loss.

    • Good news: you don’t have to eat Atkins bars to do Atkins. I find they’re pretty junky and I’m fairly fed up with maltitol anyway. I actually don’t mess with much of any Atkins food product because when it’s not maltitol it’s soy and when it’s not soy it’s wheat. Bleah.

      You can now find MEAT-BASED protein bars on the market if you look a little. Kroger and Whole Foods carry them if you have either of those. Epic Bar is a fairly good brand, just be careful which flavor you get because some have sugar added.

  35. Kathy Lebrecht says

    I have a good recipe that uses whipping cream and cream cheese.
    11/2 cups cream cheese
    1 cup whipping cream, whipped
    Whip the cream then add cream cheese, 3 packets Splenda or stevia and 1 t. Vanilla
    Mix with beaters
    Makes 8 servings
    250 calories and 2.6 carbs

  36. Kathy Lebrecht says

    Are salted macadamia nuts ok on the fat fast?

  37. Tawnya Telenko says

    Hi, I have a dairy protein allergy, so absolutely no cheese..any other suggestions?

  38. Esmy Noriega says

    hello- so ill make it quick and short. Being doing HFLC for the past 8 weeks- have lost some weight about 8 lbs. I’m really close to my body’s frame suggest weight which is 130-145 . I was 145 now down to 136. I want to do a reset but I am curious as to what would bring more loss- Doing a fat fast or doing a water fast since I appreciate the idea of Intermit fasting . Was thinking of doing this for two days but not sure if its really going to get me down , or I am better off doing the Fat Fast. So a few of my friends entered a contest, to see who can lose the most weight- but as a girl I am at a disadvantage as opposed to a overweight 200 lb man whos really my competition. I know its rather late but I appreciate your time in advance and I appreciate any guidance

  39. stacy – i know your post is a year old, but did this help with cellulite? i need to lose 15lbs fast and cellulite is an issue. I’d like to go from 130 to 110

  40. TheologiaVeritas says

    what are the potential dangers?

    • Not much unless you are really skinny.
      3 days is safe.
      You may have some electrolyte issues. I’m new to this site but other sites suggest salt if dizzy, cream of tartar if feeling unwell.

      You can always try it for a day and see how you go.

  41. windows r so hard says

    Glad I read until the end – my plateau has only been a couple of days – after 2 lbs per week for a month.

  42. Linda Martin-Peoples says

    Will try the Cream Cheese next week…seems like I go from one plateau to the next! I am in no hurry, tho…I am dedicating a year to this WOE, and have no doubt I will stay on it for life. Almost 4 months in, down only 21 pounds, but lots of inches…a noticeable difference! Very pleased! Much thanks for all the info!

  43. What is considered a plateau? I typically fluctuate up and down 3 pounds easily on a daily basis but have been unable to drop below this weight for about 2-4 weeks now. Wondering if this is a good thing to try to break this.

  44. Michelle B says

    Is there anything you can use besides mayonnaise? Can’t stand it!

  45. In the old days Atkins was just Macadamia nuts, if I remember correctly 5 meals of 1 oz. It worked great! But honestly I only would do it for a day, maybe two but it really would kick me back into ketosis. Sometimes if I plateau I would have a moderate cheat day then do the fat fast, really worked for me. I cant explain why but the combo would jump start loss again. This plan might be a little easier to stick with for more than the one day I was able to pull off in my younger days.

    • GFRestAdventures says

      It was macadamia nuts and cream cheese in the Atkins book. Very boring but effective.

      • What I don’t get is when I look up mac nuts, the saturated fats and carbs re relatively high. How is that an option when another guide on this page explicitly says to stay away from such things? What am I missing(Trying to understand this diet more to know if it’s for me) also, the free 30 day meal download doesnt work.

        • Fiber! Subtract the fiber from the carbs to get the net carbs. A cup of macadamia nuts is about 8 net carbs. (Also 1,000 calories – so I wouldn’t necessarily eat a whole cup at once.)

          • I think you answered my previous question. Can I eat 1 cup of the macadamia nuts as my one meal (I practice daily IF /One Meal A Day). I’m already fat adapted two so 3 days won’t cause any issues.

          • 1 cup is just around 1,000 calories so you could eat this for each day of your 3-day fat fast.

  46. I was wondering about your opinion on MCT oil capsules? Or is it better to just take the oil? thank you!

  47. How much water should be consumed during a fat fast?

    • Consume the same amount of water as you would while keto dieting.

      More specifically, the current research suggests that women should drink more than 3 liters of water per day and men should drink more than 4 liters of water per day.

  48. Amy Bainbridge says

    Hi! I’ve been doing keto for 4 months and just had an off weekend (2 cheat days) would this be ok to do to get back into/on ketosis? thanks!

  49. Sarah Giemza Kline says

    What makes the fat fast potentially dangerous other than “starvation mode” if you go too long?

    • Great question, Sarah!

      When you restrict calories to this degree for too long:
      1. You will develop various vitamin and mineral deficiencies, leaving you vulnerable to various diseases.
      2. Your metabolic rate will plummet
      3. You will lose a substantial amount of your muscle mass
      4. You will most likely feel fatigued, unhappy, and irritable

      This is why we recommend the fat fast as a short term weight loss boosting tool, not a diet in itself.

  50. can I just do every other day ( total of 3 days?)

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