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Home » Performance » Fasting

5-Day Egg Fast: A Comprehensive Guide to Rapid Keto Results

Posted: Apr 25, 2016 · Updated: Sep 3, 2025 by Tisa · 140 Comments

Curious about the buzz surrounding the keto egg fast? This intriguing approach, often referred to simply as an "egg fast," is gaining popularity in the low-carb and keto community. Despite varying interpretations found online, the egg fast typically involves a short-term, focused diet primarily used to accelerate weight loss, often yielding results within just 5 days.

While the science behind the egg fast remains largely unexplored, many keto enthusiasts report significant success in overcoming weight loss plateaus with a 5-day egg fast. The anecdotal evidence from social media and forums is compelling, though a scientific understanding of its efficacy is still developing. As someone immersed in the keto lifestyle, I've gathered insights and observations about the egg fast that might shed some light on its effectiveness.

Table of Contents

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  • Understanding the Egg Fast
  • Exploration of Egg Fast Efficacy
  • Anticipating Results from the Egg Fast
  • Key Rules for a Successful Egg Fast
  • Health Considerations for the Egg Fast
  • My Personal 5-Day Egg Fast Experiment
  • MORE RECIPES TO TRY!

Understanding the Egg Fast

The Egg Fast, a unique dietary approach within the keto community, involves a strict regimen of consuming primarily eggs, healthy fats, and full-fat cheese over a span of 3 to 5 days. The rules are straightforward: consume a minimum of 6 eggs daily, accompanied by 1 tablespoon of fat per egg, and limit cheese intake to the equivalent number of eggs consumed.

This egg-centric diet results in a macronutrient distribution that aligns with the keto philosophy—extremely low in carbs, high in fats, and moderate in protein. However, unlike typical keto diets, the Egg Fast has a notable absence of fiber sources like greens, seeds, and nuts. Due to this, I advocate for a short-term commitment to the Egg Fast. Supplementing with magnesium, potassium, and vitamins, along with consuming ample water (at least 10 cups daily), is advisable to balance the diet's restrictive nature. Remember, these are personal suggestions and not medical advice.

Exploration of Egg Fast Efficacy

But what makes the Egg Fast effective? Predominantly, it appears to facilitate significant water loss. Yet, beyond this immediate effect, many report sustained weight loss or maintenance post-fast. This could hint at underlying hormonal interactions affecting metabolism, a fascinating area ripe for scientific research. As the understanding of the Egg Fast evolves, so will our insights into its mechanisms and long-term impacts.

Related: 5 Reasons Why Egg Fast Diet Is Popular and Successful

Anticipating Results from the Egg Fast

Embarking on the Egg Fast, a distinctive aspect of the keto regimen, isn't about calorie restriction but focuses on a specific nutritional profile: high in fats, low to moderate in proteins, and virtually zero carbohydrates. When adhered to for a continuous five-day period, participants typically report experiencing noticeable water loss, and in some cases, fat loss—especially when coupled with mindful eating and regular exercise.

The outcomes of the Egg Fast, however, can vary from person to person. Factors like starting weight, muscle mass, and exercise frequency play a significant role in determining individual results. It's important to set realistic expectations and understand that each body responds differently to this unique dietary approach.

A lot of people on low-carb and keto diets does 5 days of egg fast to break their weight loss stall. Surprisingly, it works for majority of them.

Key Rules for a Successful Egg Fast

Embarking on the Egg Fast requires adhering to specific guidelines to effectively break through a weight loss plateau. Here's a comprehensive list of the rules that are generally recommended for those undertaking this unique dietary regime:

  1. Egg as Primary Nutrition: Eggs are the main source of fat and protein.
  2. Fat Accompaniment: Consume 1 tablespoon of healthy fat with each egg.
  3. Timely Egg Consumption: Eat your first egg within 30 minutes of waking up.
  4. Regular Eating Intervals: Meals should be spaced every 3 to 5 hours.
  5. Scheduled Eating: Stick to the eating schedule and consume at least one egg, even if not feeling hungry.
  6. Cheese Intake: You may have 1 ounce of full-fat cheese per egg consumed.
  7. Minimum Egg Requirement: Aim to eat at least 6 eggs each day.
  8. Pre-Bedtime Eating: Your last egg should be eaten at least 3 hours before going to bed.
  9. Diet Soda Allowance: Up to 3 cans of diet soda are permitted daily.
  10. Spices and Sauces: Spices and hot sauces can be used but in moderation. Ensure any sauces are low in carbs.
  11. Sweeteners: Low carb sweeteners are permissible.

I have no idea, who's come up with the rules. Moreover, every source has them listed a tiny bit differently, but the basics are staying the same. Anyways, they do make sense in a way if you consider the macronutrient outcome at the end of the day. Maybe you are dairy intolerant or hate cheese. Well, choose something else with similar nutritional value: high fat, protein, and almost no carbs. Or eat more eggs if that acceptable to you.

Health Considerations for the Egg Fast

When contemplating the Egg Fast, it's essential to evaluate its health implications. Primarily, it's designed as a short-term dietary strategy, typically not exceeding 5 days. For a healthy individual, this duration should pose no significant risk, provided there is sufficient energy intake to support daily activities.

Eggs, the cornerstone of this diet, are highly nutritious, offering a rich source of essential micronutrients. Thus, during the 5-day Egg Fast, nutrient deficiencies are unlikely to be a concern. However, the quality and freshness of the eggs used are crucial. Always ensure you're using fresh eggs to avoid any health risks associated with spoiled or contaminated eggs.

While the Egg Fast can be an interesting dietary experiment, it is advisable to practice it infrequently—perhaps once every six months. The long-term health benefits of this approach remain unclear, and it's more of a short-term solution rather than a sustainable lifestyle choice.

I Did a 5 Day Egg Fast on the Keto Diet and This Is What Happened

My Personal 5-Day Egg Fast Experiment

Back in 2016, I embarked on a personal challenge to explore the Egg Fast for myself. This experiment was born out of my fascination with food challenges and a desire to address some physical changes. After noticing some unwanted puffiness following a shift in my workout routine, and indulging a bit too much in keto treats, I was curious to see how my body would respond to the Egg Fast.

I've decided to try the Egg Fast myself. One of the reasons being that I like little food challenges. 😉 The other reason is that I've noticed my body puffing up since I started lifting heavier again. I know it's what usually happens at first when one changes their workout routine but still gets on my nerves. Plus, I've been consuming too much keto treats lately. Additionally, I think I've even been going way over my ideal daily calorie intake (though I still have no idea what my ideal is, honestly), and I think that doesn't help getting rid of puffiness. Long story short, I wanted to lose a couple of pounds of the excess water and see how my body responds to the egg fast.

I've decided to go on a 5-day Egg Fast (instead of just 3), but with one of the above rules broken (or ignored). I love working out in a fasted state in the mornings, so during the fast I will just consume green tea with a little bit of coconut oil and guarana every morning. It's not bulletproof green tea, but it's been my morning pre-workout routine for quite a while now, and I like it, so I'll stick to it.

What I find quite interesting, is the rule about consuming diet soda. Ok, diet sodas, they're low carb, sugar-free, and all that. But, if I were forming the rules, I would limit all the artificial sweetener and/or sugar alcohols (even erythritol) consumption to one snack per day at the most. That is because, for a lot of us, they cause fake hunger or even cravings. I don't drink diet soda often myself, but I guess they have the same effect (or not?) as sugar-free sweets. My explanation is that the brain gets the sweet taste but not the serotonin release after the intake, that is why it just wants more. But I won't turn all scientific just now. Still, need to start writing the science section of this blog.

So, on to my 5 days on the Egg Fast. I'll be writing about my well-being, losing pounds (or not), workouts, and especially the meals, plus the amount of eggs/fat/cheese consumed. Most of the recipes are taken from other blogs, and I'll direct you to them as I go.

I won't plan ahead too much. I'll take my time to choose and try out as many egg fast recipes as possible. It's going to be a week of working from home, and this allows me to get familiar with some of the meals I could make in advance on extra busy weeks.

If you wish, you can use this diary as a source for your Egg Fast meal plan. Or take it just as an interesting read from a fit person who's using the fast as an experiment rather than a way to lose a significant amount of weight. Of course, if you're on your own fat loss journey, my diary can still come in handy in practice. Hopefully!

Read about my Day 1. Or jump to Day 2, Day 3, Day 4, or Day 5. Note: You can find out about the overall egg-fast outcome at the end of my Day 5 post. Enjoy!

Does this sound boring? Not if you consider rewarding yourself with an egg fast friendly dessert.

Does it sound unhealthy? I guess it could be if you tried to attempt it cold turkey, not being keto-adapted first, if you have any medical issues (consult your doctor first!) or if you restrict the calorie intake too drastically.

It helps to know that eggs are very nutritious, they come with extremely healthy micronutrients, but it is also very handy to get some insight into what happens with the eggs as they age!

MORE RECIPES TO TRY!

Egg Fast Custard Tart is for anyone who likes eggs and desserts
Pin for later
Egg Fast Custard Tart
Egg Fast Custard Tart is for anyone who likes eggs and desserts!
Read More →
Egg fast pancakes are a great choice when keeping away from dairy. Egg-fasting or not, these are delicious and satiating!
Pin for later
Egg Fast Pancakes
Egg fast pancakes are a great choice when keeping away from dairy. Egg-fasting or not, these are delicious and satiating!
Read More →
Pin for later
Egg Fast Pie
One slice comes out to be approximately 181 Calories, Fat: 14.5 g (of which Saturated: 8.3 g, MUFA's: 3.4 g), Total Carbs: 3.9 g, Fiber: 1.5 g, Net Carbs: 2.4 g, Protein: 7.5 g
Read More →
Pin for later
Keto Cloud Cake
Half of the cake comes out to be 326 Calories, Fat: 30.8 g (of which Saturated: 19.6 g, MUFA's: 4.8 g), Total Carbs: 2.2 g, Fiber: 0 g, Net Carbs: 2.2 g, Protein: 8.2 g
Read More →
While egg fasting, I came up with this egg fast mascarpone roll recipe. I warn you that this is a delicious egg fast treat. #eggfastrecipe #eggfast
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Egg Fast Mascarpone Roll
While egg fasting, I came up with this egg fast mascarpone roll recipe. I warn you that this is a delicious egg fast treat.
Read More →

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About Tisa

Tisa has an MSc degree in Psychology, is a Ph.D. candidate in Neuroscience, and a passionate cook. Determined to sweeten up peoples' lives with lip-smacking keto and low-carb recipes.

Reader Interactions

Comments

  1. Sue says

    August 11, 2021 at 7:18 pm

    Hi, Is it only water loss, not fat lose, and does calories not count.

    Reply
  2. jennifer merasty says

    February 25, 2021 at 3:42 pm

    Can I still work out when I am on the egg fast diet?

    Reply
    • Tisa says

      February 26, 2021 at 2:35 pm

      If you're able to, why not. Have you read my post? I kept working out.

      Reply
  3. Kamyar Amjadi says

    January 29, 2021 at 8:00 am

    I have four questions,
    First do you mean 10 grams or 15 grams for each table spoon of butter?
    Second, does it make any difference if I use grass fed butter or grass fed eggs?
    Third, can I a have bacon instead of butter once a day
    I am 178 pounds, so over all i should I have 1200 calories or in can increase to 1600 calories?
    Thanks

    Reply
    • Tisa says

      January 29, 2021 at 2:29 pm

      Hi Kamyar.

      Butter usually measures out to be 15g per Tbsp.
      Technically, it doesn't make a difference if you use grass-fed ingredients. But grass-fed is a healthier option, especially in terms of the Omega 3 to Omega 6 ratio.
      Well, I'm not forbidding you bacon but that's additional protein, salt, and fat that an egg-fast "cleanse" doesn't predict, so you might get to your desired results more slowly.
      Lastly, as I disclaim numerous times on this website, I do not give out weight-loss and health advice. Nevertheless, 1200 Kcal seems waaaay too low for a 178 pounds person, even 1600 is quite low, especially if you are even moderately active. Please, don't starve would be my main advice.

      Reply
  4. Teresa says

    July 09, 2020 at 1:58 am

    The only reason the egg fast has diet soda is because the creator was addicted to diet sodas and wanted to kick the addiction do he limited himself to no more than 3, but tried for none.

    Reply
    • Tisa says

      July 24, 2020 at 11:22 am

      Thank you for the insight, Teresa!

      Reply
  5. Fabian says

    June 23, 2020 at 12:51 am

    Does bacon and avocado fit in?

    Reply
    • Tisa says

      July 24, 2020 at 11:23 am

      If you stick to the rules, then no. But there is no egg fast police out there to watch over you. 😉

      Reply
  6. Natalie says

    May 06, 2020 at 3:44 pm

    Can I just have 8 boiled eggs instead of all these recipes. Want it to be as simple as possible

    Reply
  7. Tara says

    April 09, 2020 at 7:14 am

    About to start my egg fast for 5 days. I want to clear up some confusion. Minimum of 6/day ✔ For healthy fats do I just have 1Tb of butter per egg? I'm consuming 2-2 1/2 gallons of water each day. 4 cups coffee per day. What cheeses are considered healthy to eat on this?

    Reply
  8. Louise Lowery says

    November 11, 2019 at 3:23 pm

    Hi I drink hot water with lemon and chia seeds sprinkled in How do you feel about that during fast? Also any idea if you can add mushrooms to eggs ie in omelettes?
    Thankyou

    Reply
    • Tisa says

      November 12, 2019 at 10:02 am

      I see no problem in doing all that.

      Reply
  9. Jo van Schendel says

    November 10, 2019 at 6:54 pm

    Good evening
    Can i do EF and drink
    Chicken Bouillon
    Thanks for your time
    [email protected]

    Reply
    • Tisa says

      November 12, 2019 at 10:05 am

      I guess it would be good for electrolytes, but I would watch the salt intake. I'm not sure how salty the chicken bouillon is. Too much salt might cause your body to retain water which could counterbalance the water loss you would normally see on an EF. But that is just my guess.

      Reply
  10. Spooky Boo says

    November 08, 2019 at 5:36 pm

    It works because not only is it keto, there is an abundance of choline in the egg yolks which helps the liver function and heal.

    Reply
  11. ryz says

    November 03, 2019 at 4:10 pm

    hi...it says 6 per day..n other foods?

    Reply
  12. Sergei says

    October 13, 2019 at 5:51 am

    Instead of cheese I add cod or pollock liver or pate from it. We also have like pollock liver-and-caviar pate... I'd rather stay away from cheese.

    Reply
  13. Pierre says

    July 21, 2019 at 12:56 pm

    for non-USA keto-goers, 1 ounce is 28 (±30) grammes cheese per egg

    Reply
  14. Cathy says

    February 09, 2019 at 5:18 pm

    Confused about the egg diet. You eat an egg with a piece of cheese. Get that part, but do you also add fat like mayonnaise or butter or is the cheese considered the "fat"?

    Reply
    • My Sweet Keto says

      February 09, 2019 at 7:38 pm

      You don't really need all the cheese but you do need the healthy fats on the egg fast diet. Hope this makes it clear that yes, you also add fat.

      Reply
  15. Deb says

    February 07, 2019 at 5:55 pm

    Hi,

    Egg Fasting diet can be for more than 5 days?

    Reply
    • My Sweet Keto says

      February 08, 2019 at 8:43 am

      I think you can extend it for a couple of days more if you wish but I wouldn't recommend going over a week.

      Reply
  16. Jill says

    February 07, 2019 at 2:51 am

    so what were your results??? I will start with a 3 day egg fast and I think it will be easy for me since I love eggs but not sure I can last 5 days...maybe the week before my beach vacation i will do the 5 day lol

    Reply
    • My Sweet Keto says

      February 07, 2019 at 3:13 pm

      Hey. I started already fit, so was down around 2 - 3 pounds max each time. Mostly water loss.
      Good luck, 5 days pass by in no time! 😉

      Reply
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