Keto Diet Diarrhea: Causes, Prevention, and Treatment

Following the keto diet can lead to a range of benefits, including weight loss and improved energy levels. However, some individuals may experience digestive issues, including diarrhea, when transitioning to this low-carb, high-fat diet.

In this section, we will explore the causes of keto diet diarrhea, as well as strategies to prevent and treat this side effect. We will also touch upon other common side effects of the keto diet, such as the keto flu symptoms.

If you’re considering starting the keto diet or are currently experiencing diarrhea or other digestive issues while following this eating plan, this article provides valuable information to better understand and manage these symptoms.

Understanding Diarrhea on the Keto Diet

Diarrhea is a common side effect experienced by some individuals who follow the keto diet. While it may be unpleasant, it is often a temporary symptom that improves as the body adapts to the new diet.

The keto diet is a low-carb, high-fat, and moderate protein diet that aims to shift the body’s metabolism into a state of ketosis.

This is a metabolic state where the body burns fat for energy instead of carbohydrates. The significant reduction in carbohydrate intake during the keto diet can affect the digestive system and result in diarrhea for some individuals.

The changes in macronutrient intake, particularly the significant reduction in carbohydrates, can cause changes in the gut microbiome.

This alteration can impact digestion and lead to digestive problems such as diarrhea. Additionally, inadequate fluid intake or electrolyte imbalances can also contribute to the development of diarrhea on the keto diet.

How the Body Adapts to the Keto Diet

During the keto diet, the body adapts to using ketones as an alternative source of energy, which results in several changes in metabolic processes and hormonal balance. These changes can affect bowel movements and digestion.

The body may need to adjust to the new diet to optimize digestive health and reduce symptoms like diarrhea.

It is also essential to note that some individuals may experience keto flu symptoms, such as nausea, vomiting, and diarrhea, during the early stages of the keto diet.

This is mainly because the body is adjusting to the new diet, and the digestive system is undergoing changes.

The Impact of Low-Fiber Intake on Digestion

The keto diet typically involves a low intake of carbohydrates, and as a result, a low intake of fiber. Fiber is crucial for promoting healthy digestion and maintaining regular bowel movements.

A diet low in fiber can increase the risk of developing diarrhea and other digestive issues.

Individuals who experience diarrhea on the keto diet may benefit from incorporating fiber-rich foods into their meals. Foods such as avocado, nuts, seeds, and low-carb vegetables like spinach, kale, and broccoli can increase fiber intake and promote healthy digestion.

Preventing Diarrhea on the Keto Diet

While diarrhea on the keto diet can be uncomfortable, there are ways to prevent it from occurring. These tips can help you transition to the keto diet smoothly and maintain healthy digestion:

  • Gradual Transition: Making a slow transition to the keto diet can help your body adjust to the changes in macronutrient intake. Consider reducing your carbohydrate intake gradually over a period of several weeks before starting the diet.
  • Hydration: Proper hydration is crucial when following the keto diet. Drinking plenty of water and consuming electrolyte-rich drinks, like coconut water or sports drinks, can help prevent dehydration and promote regular bowel movements.
  • Fiber-Rich Foods: Incorporating fiber-rich foods, like leafy greens, avocados, and berries, can help regulate digestion and prevent diarrhea. Be sure to consume enough fiber from these sources, as well as from supplements like psyllium husk, to support digestive health.

By following these simple strategies, you can prevent diarrhea and other digestive issues while following the keto diet.

However, if you experience persistent diarrhea or other symptoms, be sure to consult with a healthcare professional to rule out any underlying health conditions.

Treating Diarrhea on the Keto Diet

If you experience keto diet diarrhea, don’t worry, it’s a common side effect. However, it can be uncomfortable and disruptive to your daily routine.

Here are some treatment options to help alleviate symptoms and restore digestive balance.

Over-the-Counter Medications

Over-the-counter medications like Imodium can help reduce diarrhea symptoms by slowing down bowel movements. However, it is important to use these medications with caution and only as directed, as they can also cause constipation and other side effects.


Probiotics are beneficial bacteria that can help restore healthy gut flora and improve digestive function. You can take probiotic supplements or consume probiotic-rich foods like yogurt, sauerkraut, and kimchi.

Natural Remedies

There are several natural remedies that can help alleviate keto diet diarrhea symptoms. These include:

  • Drinking chamomile tea, which has anti-inflammatory properties and can soothe digestive discomfort.
  • Taking magnesium supplements, which can help regulate bowel movements and reduce diarrhea.
  • Incorporating bone broth into your diet, which is rich in nutrients and can help promote gut healing.

It is important to consult with your healthcare provider before starting any new supplements or remedies, particularly if you are taking medications or have underlying health conditions.


Dehydration can exacerbate diarrhea symptoms, so it is important to stay hydrated by drinking plenty of water and electrolyte-rich fluids like coconut water and bone broth.

Overall, keto diet diarrhea is a common side effect that can be effectively managed with appropriate treatment and prevention strategies.

Remember to give your body time to adjust to the diet, stay hydrated, and incorporate plenty of fiber-rich foods to maintain healthy digestion.

Other Common Side Effects of the Keto Diet

While diarrhea is a common and unpleasant side effect of the keto diet, it’s not the only one. As your body adjusts to the new diet, you may also experience other symptoms that can impact your daily life. Here are a few other common side effects of the keto diet:

  • Fatigue: When you first start the keto diet, you may feel more tired than usual. This is because your body is adapting to using fat for energy instead of carbs. It can take time for your body to adjust, and you may feel tired or sluggish during this transition period.
  • Brain fog: Some people report feeling mentally foggy or “off” when following the keto diet. This may be due to the changes in brain function that can occur when carbs are restricted.
  • Sugar cravings: Following a low-carb diet can also lead to intense sugar cravings. This is because your body is used to getting quick energy from carbs, and when those carbs are no longer available, it can crave sugar as a substitute.

It’s important to note that these side effects are usually temporary and will subside as your body adjusts to the keto diet. However, if you are experiencing severe or persistent symptoms, it’s always a good idea to speak with your healthcare provider to rule out any underlying health conditions.

Frequently Asked Questions about Keto Diet Diarrhea

If you’re experiencing diarrhea on the keto diet, you likely have some questions about how to manage it and whether it’s normal. Here, we address some of the most frequently asked questions related to keto diet diarrhea.

How long does keto diarrhea last?

The duration of keto diarrhea can vary from person to person. Some individuals may experience it for a few days, while others may experience it for several weeks.

It’s important to note that diarrhea that persists for an extended period of time can lead to dehydration and electrolyte imbalances. If your diarrhea lasts longer than a week, it’s best to consult with a healthcare professional.

When should I seek medical advice for keto diarrhea?

If you experience severe diarrhea, blood in your stool, abdominal pain, fever, or other concerning symptoms, it’s important to seek medical attention right away. These symptoms could indicate a more serious condition, such as an infection or inflammatory bowel disease.

Can the keto flu cause diarrhea?

Yes, the keto flu can cause diarrhea in some individuals. The keto flu is a collection of symptoms that can occur when transitioning to the keto diet.

These symptoms include fatigue, headaches, and digestive issues. Diarrhea can be a result of the sudden decrease in carbohydrates and the body’s adaptation to burning fat for fuel.

How can I prevent keto diarrhea?

Gradually transitioning into the keto diet, staying hydrated, and incorporating fiber-rich foods into your meals can help prevent keto diarrhea.

Additionally, taking probiotics can help maintain a healthy gut microbiome and promote digestive health. If you’re new to the keto diet, it’s important to give your body time to adjust and to be patient as you navigate any digestive issues.

Can I still follow the keto diet if I experience diarrhea?

Yes, it’s possible to continue following the keto diet even if you experience diarrhea. It’s important to listen to your body and adjust your diet as needed.

This may involve adding more fiber or reducing your fat intake temporarily. If your diarrhea persists, it may be helpful to work with a healthcare professional to develop a personalized approach to the keto diet.

Overall, while keto diarrhea can be frustrating, it’s important to remember that it’s a common side effect for some individuals. With patience and a personalized approach, you can manage your symptoms and continue to reap the benefits of the keto diet.

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