Keto Cheat Day: Does it Destroy Your Progress? (2024)

By EMMIE SATRAZEMIS, RD, CSSD November 9, 2019

Wondering what happens when you fall off the keto wagon? It is entirely possible to include cheat meals on your keto diet and still lose weight. But how drastically and how often you have a keto diet cheat is certainly going to affect your progress in the long run, and you might end up undoing a lot of hard work if you aren't careful.

Here is everything you need to know about keto cheat days including what happens when you cheat and how to enjoy "forbidden" cheat meals the right way.

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Can You Have a Cheat Day on Keto?

If your primary goal is to lose weight, cheating on your keto diet from time to time is not going to destroy your progress. Even if it kicks you out of ketosis.

Yes, you heard that right. If you just couldn't resist that slice of cake or pasta dinner and chose to indulge in a few extra carbs, don't stress. This cheat meal isn't a reason to throw your entire diet out the window.

Ketosis could have some potential health benefits, but it’s likely not the main reason you are losing weight - calorie control is.So as long as you aren’t going overboard with the cheat days and maintaining calorie control overall, all those carbs aren’t going to destroy all of your hard work.

Of course, if your goal is staying in ketosis for other reasons (not weight loss), cheating on a ketogenic diet might not be the best idea.

In one small study, researchers found keto cheat days could increase heart health risks among diabetics following a keto diet to manage blood sugar levels (1). While more research is needed, these initial findings indicate cheat days may not be ideal for everyone on a keto diet.

What Happens When You Cheat on a Keto Diet?

Here are all the things that go down when you add carbs back in with a ketogenic diet cheat day:

  1. Your blood sugar will spike, making an abundance of quick energy available and causing your body to switch back to glucose as a source of fuel.
  2. Ketone production will stop.
  3. A majority of the sugars you eat will likely be used to replenish glycogen stores. This may cause a temporary gain in water weight.
  4. Your body will continue to use up available glucose and glycogen stores until you run out.
  5. Ketone production will resume.

Going off a keto diet is likely not detrimental. Just because you start eating carbs again, especially just for one day, doesn't mean you will store a bunch of body fat.

Carbs do not cause weight gain or increased body fat. Only eating too many calories can do this.

And while you may have a slight adjustment period with blood sugar levels and water retention, as long as you are maintaining calorie control, you shouldn't end up gaining any weight.

Because of the blood sugar spike, it is common for some people to notice an intense sugar crash after cheating with a carb heavy meal.

And depending on how long you've been cutting carbs, you might also notice some repeat symptoms of "keto flu" when resuming your keto diet.

How Many Grams of Carbs Will Take You Out of Ketosis?

The number of carbs needed to kick you out of ketosis can depend on the person and how long you’ve been doing keto. But, it’s safe to say that any high-carb meal over your recommended daily carb limit will do the trick. And the effect is pretty immediate (aka the same day).

For example: if you need to eat less than 20 grams of carbs per day to stay on keto, a cheat meal with 20 or more grams of carbohydrates will probably cause you to fall off the wagon.

It might take you a little while to switch back once you get back to your keto meal plan since it takes anywhere from one day to a week to get into ketosis in the first place. But for most people, this process happens much quicker the second time around.

How long you've been keto and your ketone levels can also have an impact on how much a splurge is going to affect you.

If you have been on keto for more than 3 to 6 weeks, you are likely getting 70% of your energy from fat, and it will be much easier to go back into ketosis quickly, compared to someone who is not fully fat-adapted.

How to Cheat on a Ketogenic Diet the Right Way

Cheat days have become a popular theme with many diets and for good reason. In fact, many experts have embraced diet cheats as a way to teach a more balanced approach to healthy eating.

Besides the fact that we are humans, not robots, and it can feel pretty impossible to stick to your keto diet perfectly, research says there may actually be some benefits to going off your diet. Including a strategic diet cheat may have some psychological benefits like reduced cravings and the ability to stick to your meal plan better overall (2).

Done right, cheating on your diet can help you stay motivated, and teach you how to have moderation as you build sustainable long-term health habits. Plus who doesn’t want to learn how to have their cake and eat it too?

Here’s how to include cheats without going off the rails.

Opt For Keto Approved Cheat Meals

Arguably, the best way to approach cheat days is by not cheating on your diet at all and splurging on keto-friendly substitutes to curb your cravings instead, saving true cheat meals as a last resort.

You can find a recipe a ketogenic version of just about any popular meal you can think of to keep you on course. not to mention the endless supply of packaged keto snacks and "cheat foods" hitting the market. So if it's an option to grab one of these instead, this should be your first line of defense.

Have Cheat Meals Not Cheat Days

If you are going to go off your diet, is way easier to stay on top of your overall nutrition and calories with cheat meals compared to entire keto cheat days. One large cheat meal can add 1,000 or more calories to your day, while a whole cheat day will add much more and potentially undo all of your hard work from the week.

Have a Plan

The easiest way to ensure your diet cheats don’t ruin your progress is to plan for them. Pick which meals you’re going to cheat and budget some calories and carbs in advance if you can.

You can also ensure your cheat meals are worth it by prioritizing certain events or favorite foods over random temptations that will always be there.

For example, if you know there is a social event coming up on the weekend, have a rough idea of how you will plan to cheat and enjoy it without going overboard.

You might also want to plan smaller cheats around exercise to help keep you in ketosis since you are using up the extra carbs quickly.

If your goal is calorie control, aim to cheat no more than once or twice a week. But if ketosis is important for your progress, consider cheating much less often, like once a month.

And if you are new to a keto diet, wait at least a few weeks to get some progress going before even considering cheats. Look – if you're tired of thinking about what's allowed on keto, order keto meal delivery!

Keto Cheat Day: Does it Destroy Your Progress? (6)

Track Your Daily Intake

Don't forget to track your calories and daily macros. If your cheats are blowing your weekly nutrition goals out of the water, you might end up gaining weight.

Use a popular macro-friendly app to see how much damage you are doing.

Keto Cheat Day Recovery Tips

The best way to recover from a keto cheat day is to resume your low carb keto lifestyle. As long as you are being smart about how much and how often you are cheating on your diet, you likely don’t need to take any new, special measures to keep getting results.

Just enjoy the short break and then move on!

If you're finding that you are cheating on keto too often and having a hard time sticking to your keto diet consistently, it might be time to revisit whether or not this diet is right for you. At the end of the day, the best diet for you is going to be one you can stick to!

Need help managing your ketogenic diet? Have fewer cheat days and stick to your goals with keto meal prep delivery. Our expert chefs and nutritionists will do the planning, shopping, and cooking for you, so that you can focus on other things.

Keto Cheat Day: Does it Destroy Your Progress? (7)

Keto Cheat Day: Does it Destroy Your Progress? (2024)

FAQs

Keto Cheat Day: Does it Destroy Your Progress? ›

Can you have cheat days on a keto diet? If your primary goal of following a keto diet is to lose weight, the occasional cheat day or cheat meal is not going to completely wreck your progress even if it disrupts ketosis. Ketosis has potential health benefits, one of which is calorie control.

Will a cheat day ruin my progress on keto? ›

While many dieters think of cheat day as a well-deserved reward, nutritionists say there are downsides to it. Some disadvantages of having a cheat day on keto include getting knocked out of ketosis and hindering further weight loss.

Will I lose progress if I have a cheat day? ›

While your metabolism may go up in the immediate aftermath of a splurge, it doesn't stay that way for long enough to make a significant difference. “Cheat day calories can add up fast and bring your weight loss progress to a screeching halt — or even reverse it,” Taylor warns.

What happens if I break my keto diet for one day? ›

Every time you have a cheat day, your progress will be reset and you'll need to start all over again. This exchange between being in ketosis and having cheat days may hinder the benefits of the keto diet especially for weight loss and overall well-being altogether.

How long does a cheat day knock you out of ketosis? ›

Overall, you can get back into ketosis as soon as 12-16 hours after your last cheat meal (with the help of fasting and exercise) or it can take as long as it did when you first started keto.

Can you do 5 days on 2 days off keto? ›

Keto cycling doesn't have a strict definition. Some people choose to have five or six days on keto followed by a day or two off. Others will do keto for 10 to 12 days followed by three to four days off. Devine typically doesn't recommend taking more than two days off keto.

How to get back into ketosis after a cheat day? ›

Here are a few tips to help you get back into ketosis:
  1. Try intermittent fasting. Combining intermittent fasting with the keto diet may help your body shift its fuel source from carbs to fat ( 9 ).
  2. Track your carb intake. ...
  3. Try a short-term fat fast. ...
  4. Exercise more. ...
  5. Try a medium-chain triglyceride (MCT) supplement.
Jun 2, 2020

What color is your pee when in ketosis? ›

Any color on the ketone strip, from pink to purple, indicates fat burning (ketosis). Some people get a darker ketone strip color and achieve the same weight loss results as someone with a lighter color.

Will one slice of pizza take you out of ketosis? ›

Regular Crust

This type of pizza crust can have up to 33g of carbs without any added sauce or cheese. If you're limiting your carbs to 20-50 grams per day, one slice of this type of crust will likely kick you out of ketosis.

How many carbs ruin ketosis? ›

Eating more than 50 grams of carbs may disrupt ketosis.

Some people can eat more and still stay in ketosis, whereas others may need to restrict their carb intake more in order to stay in ketosis.

Why did I lose weight after a cheat day on keto? ›

The Benefits of Cheating

Research shows that after a cheat meal, the body increases its metabolism, causing you to burn calories faster. This is caused by increased levels of leptin, a hormone secreted by fat cells and responsible for maintaining energy balance in the body.

Will a 16 hour fast put me in ketosis? ›

Intermittent fasting can trigger ketosis, but only if you fast for at least 12 hours and potentially up to 18. It's also not the only way to stimulate ketosis — following a low-carb eating routine or extended periods of intense exercise can also trigger this fat-burning metabolic phase.

Will I ruin my diet if I have a cheat day? ›

He says letting off steam through a cheat day can work, as long as your cheat diet is sensible and doesn't include lots of high-calorie or unhealthy foods, such as those high in saturated fat, salt or sugar.

Is it bad to go in and out of ketosis? ›

Cycling in and out of ketosis can cause digestion problems and brain fog — and you may gain back the weight you've lost on the keto diet. What Really Happens to Your Body When examines the head-to-toe effects of common behaviors, actions and habits in your everyday life.

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