
The ketogenic diet is a low-carb, high-fat diet that has helped many people lose weight. However, it can also lead to some unpleasant side effects, one of which is diarrhea. Diarrhea is not a common side effect of a well-formulated ketogenic diet, but it can occur when transitioning to this diet due to the body's shift from burning carbohydrates to burning fat. This shift can cause a drastic increase in transit times, resulting in frequent bouts of diarrhea. Additionally, a high-fat diet can be difficult for some people's bodies to digest, leading to diarrhea. Other factors that can contribute to diarrhea on a ketogenic diet include a lack of fiber, increased consumption of artificial sweeteners and sugar alcohols, changes in gut microbiome, and allergies to keto-friendly foods. While keto diarrhea is usually temporary, it can be unpleasant and disruptive. Staying hydrated, consuming bone broth, and taking supplements like ox bile and enzymes can help alleviate diarrhea symptoms. Seeking advice from a healthcare professional is recommended if diarrhea persists or is severe.
| Characteristics | Values |
|---|---|
| Diarrhea occurrence | Common when transitioning into ketosis |
| Diarrhea causes | Lack of fiber, high fat content, sugar alcohols, artificial sweeteners, allergies to keto-friendly foods, changes in gut microbiome, bile malabsorption |
| Diarrhea remedies | Proper hydration, bone broth, supplements of ox bile and enzymes, reducing protein intake, increasing fiber intake, fermented foods, probiotics, vitamin A and D supplements |
| Diarrhea warning signs | Blood in stool, severe or constant abdominal pain, diarrhea more than six times a day, diarrhea at night, diarrhea persisting for more than a week |
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What You'll Learn

Diarrhea is a common side effect of transitioning to a ketogenic diet
The ketogenic diet is a low-carb, high-fat diet that involves deriving 70-80% of one's daily energy intake from fat. This shift from a carb-burning mode to a fat-burning mode can cause diarrhea, which is a common side effect of transitioning to this diet.
Causes
There are several reasons why the keto diet may lead to diarrhea. Firstly, the high-fat content of the diet can be difficult for some people's bodies to digest. When fat isn't broken down properly in the small intestine, it travels to the colon, where it is digested by bacteria, leading to gas, bloating, and fat in the stool. The extra fat in the stool results in looser stool, or diarrhea.
Secondly, the keto diet can impact the composition of the gut microbiome, which has implications for digestion. Studies have shown that after three months on the ketogenic diet, the bacteria in the gut change, which can cause diarrhea in some people.
Additionally, the keto diet may not provide enough fiber, which is crucial for gut motility and function. A lack of fiber can lead to constipation, but it can also contribute to diarrhea.
Furthermore, people on the keto diet often consume higher amounts of sugar alcohols and artificial sweeteners, which can cause bloating and diarrhea when consumed in excess.
Remedies
To alleviate keto diet-related diarrhea, it is recommended to focus on increasing fiber intake through foods such as nuts, seeds, leafy greens, cruciferous vegetables, citrus fruits, berries, avocado, broccoli, and chia seeds. Staying properly hydrated is also crucial, as the keto diet can cause a loss of water and electrolytes. Bone broth, supplements of ox bile, and enzymes can also help.
In some cases, reducing protein intake slightly can help alleviate diarrhea. It is important to ensure that you are getting enough probiotics, acids, and other nutrients to support gut health and digestion. Fermented foods, such as pickles, sauerkraut, and kimchi, are good sources of probiotics and can aid in digestion.
If diarrhea persists or becomes severe, it is important to consult a healthcare professional to rule out any underlying causes and ensure that your symptoms are not indicative of a more serious condition.
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Lack of fibre in the keto diet can cause constipation and diarrhea
The keto diet is a low-carb, high-fat diet. It typically consists of 4% carbs, 6% protein, and 90% fat. This drastic reduction in carbohydrate intake causes the body to switch its fuel source from glucose to fatty acids. This shift can lead to a build-up of fat in the colon, which can cause gas, bloating, and looser stools.
The keto diet is often criticized for its lack of fibre. Carbohydrates like fruits and whole grains are some of the most common sources of fibre, and the keto diet restricts these foods. This can lead to digestive issues like constipation and, less commonly, diarrhea. Fibre is crucial for maintaining healthy bowel movements, and without enough fibre, stools can become hard and difficult to pass.
There are, however, ways to increase your fibre intake while on the keto diet. Avocados, for example, are a great source of fibre and fat. Nuts and seeds are also good options, as they are high in fibre and low in net carbs. Other keto-friendly sources of fibre include leafy greens, broccoli, berries, and cruciferous vegetables like broccoli and cabbage.
If you are experiencing constipation or diarrhea while on the keto diet, it is important to increase your water intake and consider adding fibre-rich foods to your diet. Staying hydrated is crucial, as the shift to a fat-burning mode causes the body to flush out water, which can speed up transit times and lead to diarrhea.
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Excess dietary fat in the keto diet can cause diarrhea
The keto diet is a low-carb, high-fat diet, with 4% carbs, 6% protein, and 90% fat. This shift from carb-burning mode to fat-burning mode can cause diarrhea. Diarrhea is a common side effect of transitioning into ketosis.
When you switch to the keto diet, your body flushes out water that is attached to the glycogen stored in your muscles. As excess water leaves your digestive tract, it can speed up transit times, resulting in frequent bouts of diarrhea.
Additionally, the keto diet may cause a delay in the enzymes that digest fat. If fat is not broken down in the small intestine, it travels to the colon and gets digested by bacteria, leading to gas, bloating, and fat in the stool. Extra fat in the stool can cause diarrhea.
Some people may also experience diarrhea due to a buildup of toxic byproducts like ammonia in the digestive tract. This can occur when eating more protein than the stomach enzymes can break down.
It is important to note that everyone's colon is unique, and some people may experience constipation while others have diarrhea when on the keto diet.
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Sugar alcohols and artificial sweeteners can cause diarrhea
Diarrhea is a common side effect of transitioning to a ketogenic diet. This is because the keto diet is high in fat and low in carbohydrates, which can be difficult for the body to digest.
One of the causes of diarrhea on a keto diet is the consumption of sugar alcohols and artificial sweeteners. These are often found in sugar-free and low-carb products, which are typically consumed on a keto diet. While these sweeteners are generally considered safe, consuming them in excess can cause bloating and diarrhea. Sugar alcohols can also have a negative impact on the gut microbiome, which can lead to further digestion issues.
Sugar alcohols are a common cause of diarrhea, independent of a ketogenic diet. Sugar alcohols are often used as a sweetener in sugar-free and low-carb products, as they provide a sweet taste without the carbohydrates of table sugar (sucrose). However, consuming too many sugar alcohols can lead to digestive issues, including diarrhea.
It is important to note that there are many other causes of diarrhea on a ketogenic diet, including infection, medications, dietary factors, and underlying health conditions. Additionally, a lack of fiber in the keto diet can lead to constipation, which can also be uncomfortable and disruptive.
If you are experiencing diarrhea on a ketogenic diet, it is important to stay hydrated and replenish electrolytes. Increasing your consumption of probiotics, fiber, and acids can also help relieve diarrhea. Natural sources of these nutrients include fermented foods, berries, and vegetables.
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Gut microbiome changes can cause diarrhea
Diarrhea is a common problem worldwide, and the occurrence of diarrhea is highly associated with the gut microbiome. The gut microbiome is the ecosystem of microbes that live in your intestines. An imbalance of the gut microbiota increases susceptibility to various pathogens and causes diseases, including diarrhea.
The ketogenic diet is a low-carb, high-fat diet that involves consuming 4% carbs, 6% protein, and 90% fat. This diet puts the body in a state of ketosis, where it burns fat for energy instead of glucose. While the keto diet has helped many people lose fat, it has also caused gastrointestinal issues for some. Diarrhea is a common but not often talked about side effect of the keto diet. This is because a drastic change in diet can affect gastrointestinal health. The keto diet is very low in fiber, and this can lead to digestive distress. If fat is not broken down in the small intestine, it travels to the colon and is digested by bacteria, leading to gas, bloating, and fat in the stool. This extra fat in the stool causes it to become looser, resulting in diarrhea.
Additionally, the shift from carb-burning to fat-burning causes the body to flush out water attached to glycogen stored in the muscles. As excess water leaves the digestive tract, transit times speed up, resulting in frequent diarrhea. This is why staying hydrated is crucial when transitioning to the keto diet.
To alleviate keto-related diarrhea, it is recommended to cut back on protein intake and meet calorie requirements with dietary fats like butter or ghee. Staying hydrated with water, salt, and electrolytes is also crucial. Some people may also benefit from supplements of ox bile and enzymes.
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Frequently asked questions
Yes, diarrhea is a common side effect of the keto diet, especially when transitioning into ketosis.
Diarrhea on the keto diet can be caused by an increase in fat intake, a lack of fibre, and the consumption of sugar alcohols and artificial sweeteners.
To prevent diarrhea on the keto diet, it is recommended to stay hydrated, consume bone broth, and take supplements of ox bile and enzymes.
Natural remedies for diarrhea include increasing your consumption of probiotics, fibre, and acids. Fermented foods such as pickles, sauerkraut, and kimchi are good sources of probiotics and fibre.
If your diarrhea lasts for more than a week or causes severe symptoms, you should consult your doctor. Look out for red flags such as blood in your stool or constant abdominal pain.











































