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Can I Have Cheat Days on Keto

Can I Have Cheat Days on Keto?

Exploring the Impact of Cheat Days on Ketosis

The keto diet has gained significant popularity in recent years due to its effectiveness in promoting weight loss by burning fat. However, adhering to a strict keto diet can be challenging, leading many individuals to wonder if they can have cheat days to indulge in their favorite high-carb foods. In this article, we will explore the impact of cheat days on ketosis and whether they can be incorporated into a keto diet without derailing progress.


Understanding Ketosis and the Keto Diet

Before delving into the topic of cheat days, let's first understand the principles behind ketosis and the keto diet. Ketosis is a metabolic state that occurs when the body does not have enough glucose to use as its main source of energy. In this state, the body breaks down fats into ketones, which are then used as fuel instead of carbohydrates. The keto diet is designed to induce and maintain ketosis by significantly reducing carbohydrate intake and increasing fat consumption.

What is a Cheat Day?

A cheat day is a designated day where individuals following a keto diet allow themselves to deviate from the strict guidelines and consume foods that are not keto-friendly. These foods typically include high-carbohydrate options such as pasta, bread, desserts, chips, and sugary beverages. Cheat days provide an opportunity to satisfy cravings and enjoy favorite foods that are restricted on the keto diet.

The Impact of Cheat Days on Ketosis

While cheat days may be tempting, it's important to understand that even a single carb-rich meal can disrupt ketosis. Consuming a significant amount of carbohydrates on a cheat day halts the production of ketones and shifts the body's primary fuel source back to glucose. As a result, the body needs to metabolize all the consumed carbs before it can return to ketosis.

Repetitive cycles of entering and exiting ketosis through cheat days can hinder the benefits of the keto diet, particularly in terms of weight loss and overall well-being. Each time ketosis is interrupted, progress is reset, and it takes time and effort to reestablish the metabolic state.

The Effects of Cheat Days on the Body

Indulging in a cheat day can have various effects on the body, which may impact overall health and weight loss goals. Some potential effects include:

1 - Blood Sugar Spikes

Consuming high-carbohydrate foods on a cheat day can cause blood sugar levels to spike. This rapid increase in blood sugar can lead to feelings of fatigue, mood swings, and increased hunger.

2 - Exit from Ketosis

As mentioned earlier, cheat days disrupt ketosis by introducing a significant amount of carbohydrates into the diet. This exit from ketosis means that the body will no longer rely on ketones as its primary source of energy and will revert to using glucose instead.

3 - Weight Gain

Cheat days can potentially lead to weight gain due to the consumption of excess calories from high-carb foods. Additionally, the body may retain water temporarily after a cheat day, further contributing to the perception of weight gain.

4 - Increased Hunger and Cravings

Consuming high-carbohydrate foods can trigger cravings and increase hunger levels. This can make it more challenging to adhere to the keto diet and may lead to overeating or further indulgence in non-keto foods.

5 - Keto Flu

Entering and exiting ketosis frequently through cheat days can prolong or exacerbate symptoms commonly associated with the keto flu. These symptoms may include fatigue, brain fog, irritability, and digestive issues.

How Long Does It Take to Get Back into Ketosis After a Cheat Day?

The time it takes to return to ketosis after a cheat day can vary depending on several factors. The types of foods consumed on the cheat day play a significant role. If the cheat day included keto-friendly low-carb snacks, the body may transition back into ketosis relatively quickly. However, if high-carb foods like bread, pizza, or ice cream were consumed, it may take longer to reach ketosis again.


Additionally, the duration of time an individual has been in ketosis prior to the cheat day can affect the reestablishment of ketosis. If it is the first cheat day after a prolonged period of strict adherence to the keto diet, it may take longer to return to ketosis compared to someone who has been following the diet for an extended period.


On average, it can take approximately 1-2 weeks for the body to resume producing sufficient ketones after a cheat day. However, individual responses may vary.

Cheat on Keto the Right Way

While cheat days may seem appealing, there are alternative approaches to satisfy cravings without completely derailing ketosis. The key is to approach cheats in a controlled and strategic manner. Here are some tips for cheating on keto the right way:

1 - Choose Keto-Friendly Alternatives

Instead of indulging in high-carb foods on a cheat day, opt for keto-friendly alternatives. Numerous recipes and products are available that recreate favorite meals and treats in a keto-compliant manner. For example, cauliflower crust pizza, keto breads, or low-carb tortillas can be used as substitutes.

2 - Consider Cheat Meals Instead of Cheat Days

Rather than dedicating an entire day to cheating, consider incorporating cheat meals into your keto diet. A single cheat meal is easier to manage and is less likely to completely disrupt ketosis compared to a full cheat day. Focus on keeping the other meals of the day low-carb and higher in protein and fats to minimize the impact of the cheat meal.

3 - Monitor Carbohydrate Intake

Even on cheat days or meals, it is essential to keep track of carbohydrate intake. Try to stay under the 50g limit of carbohydrates to maintain some level of control and prevent excessive glucose influx into the body.

4 - Maintain Balance and Moderation

Strive for a balance between adhering to the keto diet and allowing yourself occasional indulgences. It's important to find a sustainable approach that works for you in the long run. By incorporating moderation and mindful eating, you can strike a balance between enjoying keto-friendly meals and occasional treats.


In conclusion, cheat days can have a significant impact on ketosis and may hinder progress on the keto diet, particularly in terms of weight loss goals. Consuming high-carbohydrate foods on cheat days can disrupt ketosis, lead to blood sugar spikes, weight gain, increased cravings, and delay the return to ketosis. However, by strategically incorporating cheat meals, choosing keto-friendly alternatives, monitoring carbohydrate intake, and maintaining balance, it is possible to satisfy cravings without completely derailing ketosis. Ultimately, finding a sustainable and personalized approach to the keto diet is key to long-term success.

Remember, consult with a healthcare professional or registered dietitian before making any significant changes to your diet, especially if you have any underlying health conditions or concerns.




  1. University of British Columbia Okanagan campus. (2019, March 27). On the keto diet? Ditch the cheat day: Just one dose of carbohydrates can damage blood vessels. ScienceDaily.

  2. Dashti HM, Mathew TC, Hussein T, et al. Long-term effects of a ketogenic diet in obese patients. Exp Clin Cardiol. 2004;9(3):200-205.

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