
The carnivore diet is a highly restrictive diet that consists of only animal-based foods, including meat, fish, eggs, and certain dairy products. It is low in carbohydrates and fiber and high in fat and protein. One of the potential downsides of following this diet is constipation, which is a common condition characterized by infrequent bowel movements and difficulty passing stools. While the exact causes of constipation on the carnivore diet are not fully understood, it is believed that factors such as decreased fiber intake, dehydration, and changes in gut bacteria may contribute to this issue. Some people on the carnivore diet choose to include small amounts of low-carbohydrate vegetables or take fiber supplements to increase their fiber intake and prevent constipation.
| Characteristics | Values |
|---|---|
| Definition of constipation | Infrequent bowel movements, difficulty passing stools, and sometimes, abdominal discomfort |
| Causes of constipation on a carnivore diet | Dehydration, lack of electrolytes, decrease in fiber intake, decrease in gut microbiota diversity, insufficient fat intake relative to protein, nutrient deficiencies |
| Solutions to constipation on a carnivore diet | Increase water intake, increase salt intake, increase fat intake, increase physical activity, incorporate bone broth, include small amounts of low-carb vegetables, take fiber supplements, take digestive boosters |
| Criticisms of the carnivore diet | Extremely restrictive, lack of long-term research, potential deficiencies in essential nutrients, negative impact on gut health and overall health |
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What You'll Learn

Dehydration and lack of electrolytes
Dehydration and a lack of electrolytes are two factors that can contribute to constipation on the carnivore diet. The carnivore diet is low in carbohydrates, which causes the body to break down glycogen stored in the muscles and liver. Glycogen attaches to water, which is then expelled through urine. This can lead to dehydration, which can pull water out of the colon, making it difficult to pass stools.
To combat dehydration, it is recommended to increase water intake when on the carnivore diet. Health experts generally recommend 2 litres of water per day, but when transitioning to the carnivore diet, it is suggested to increase this to 2.5 litres. Larger individuals may need to increase their water intake even more. Paying attention to the colour of your urine can help you check for dehydration; it should be a light yellow colour. In addition to water, beverages like bone broth and coffee also count towards daily fluid intake.
A lack of electrolytes can also contribute to constipation. Electrolytes are essential for maintaining fluid balance and supporting nerve and muscle function, including the muscles involved in bowel movements. When transitioning to the carnivore diet, it is recommended to increase salt intake to around 12 grams (2 teaspoons) per day. Once adapted to the diet, a minimum of 5 grams (1 teaspoon) of salt is recommended to be consumed daily to avoid constipation, as well as other symptoms like fatigue and headaches.
While the carnivore diet can contribute to dehydration and a lack of electrolytes, addressing these issues through increased water and salt intake can help to alleviate constipation.
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Lack of fibre
The carnivore diet is a highly restrictive dietary approach that consists of eating only animal products and a few other items, such as certain dairy products. This diet is devoid of plant-based foods, including fruits, vegetables, grains, legumes, nuts, and seeds, which are the main sources of fibre in a diet.
Fibre is the fibrous part of food that the body cannot digest or absorb. Official dietary guidelines emphasize consuming enough fibre for good health. A reduction in fibre could be one reason why some people develop constipation when following the carnivore diet.
However, some proponents of the carnivore diet claim that a lack of fibre does not automatically lead to constipation and may even improve digestion. They cite research showing that a group of individuals with constipation experienced improved bowel movement when they followed a no-fibre diet for two weeks. After six months, those following a no-fibre diet continued to show improved bowel movement frequency, while those on a high-fibre diet still struggled with constipation.
On the other hand, the role of fibre in preventing constipation is well-established and proven in hundreds of studies. Fibre supplements like psyllium husk can be incorporated into the carnivore diet to increase fibre intake. Psyllium husk is derived from the seeds of the Plantago ovata plant and helps soften stools by absorbing water in the gut.
Additionally, the carnivore diet can impact gut health and potentially overall health by decreasing gut microbiota diversity. Gut bacteria starve due to the lack of fibre and food, which can lead to a reduction in beneficial bacteria populations.
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High-fat intake
The carnivore diet is a highly restrictive dietary approach that consists of eating only animal products and a few other items, such as certain dairy products. It is an extremely low-carbohydrate, high-fat, and moderate-protein diet. The diet typically excludes all plant-based foods, including fruits, vegetables, grains, legumes, nuts, and seeds.
The high-fat intake associated with the carnivore diet can have both positive and negative effects on digestion and overall health. On the one hand, fats provide necessary energy and aid in smoother bowel movements. Eating more fat relative to protein can help prevent constipation. This can be achieved by incorporating fattier cuts of meat or adding sources of healthy animal fats, such as butter or ghee, to meals. Bone broth, which is rich in nutrients, can also aid in gut healing and ease constipation.
However, the high-fat content of the carnivore diet can also contribute to constipation. This is because the diet is extremely low in fiber, which is primarily obtained from plant-based sources. A reduction in fiber intake can lead to changes in the gut microbiome and a decrease in gut microbiota diversity, as certain gut bacteria depend on fiber for food. While some proponents of the carnivore diet claim that a lack of fiber improves digestion, this belief is based on cherry-picked research. Most studies have shown that fiber is essential for maintaining regular bowel movements and that a decrease in fiber intake can lead to constipation.
To mitigate the potential negative effects of high-fat intake and low fiber consumption on the carnivore diet, some individuals choose to include small amounts of low-carbohydrate vegetables. Examples include leafy greens like spinach, lettuce, cucumbers, and other non-starchy vegetables. These foods can provide some fiber while still maintaining a primarily animal-based diet. Additionally, staying adequately hydrated by consuming enough water and electrolytes is crucial for preventing dehydration, which is a common cause of constipation.
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Preexisting nutrient deficiencies
The carnivore diet is a restrictive diet that consists of only animal-based foods, including meat, fish, eggs, and certain dairy products. It is devoid of plant-based foods, which can lead to potential nutrient deficiencies.
One of the main concerns with the carnivore diet is its impact on digestion, specifically constipation. Constipation can occur on the carnivore diet due to a variety of reasons, and preexisting nutrient deficiencies can make it harder for the body to adapt to this diet.
Firstly, the carnivore diet is low in fiber, which is essential for promoting gut health and healthy bowel movements. Fiber is only found in plant foods, so the exclusion of plant-based foods on the carnivore diet can lead to a lack of fiber and subsequent constipation. However, it is important to note that recent research suggests that fiber may not be as beneficial for digestion as previously thought, and reducing fiber intake may actually relieve constipation.
Secondly, the carnivore diet can lead to dehydration, which is a common cause of constipation. The low-carb nature of the carnivore diet causes the body to break down glycogen stored in the muscles and liver, which attaches to water and is expelled through urine. This can lead to dehydration, and subsequently, a lack of water for forming stools. Therefore, it is crucial for individuals on the carnivore diet to increase their water intake to prevent dehydration and constipation.
Additionally, the carnivore diet may not provide sufficient intake of certain vitamins and minerals that are typically found in plant-based sources. For example, vitamin C, calcium, vitamin E, and vitamin D are all nutrients that are less prevalent in animal-based foods and may be deficient on the carnivore diet. Vitamin D, in particular, is important for regulating bile acid production, which is crucial for fat digestion and absorption of fat-soluble vitamins.
To overcome preexisting nutrient deficiencies and prevent constipation on the carnivore diet, individuals should focus on strategic food selection and, in some cases, supplementation. Including a variety of animal products, such as organ meats, can help ensure a comprehensive nutrient profile. Organ meats, such as liver, kidney, and sweetbreads, are particularly rich in certain vitamins and minerals, such as vitamin A and B vitamins.
In summary, preexisting nutrient deficiencies can make it more challenging for individuals to adapt to the carnivore diet, increasing the risk of constipation. However, by focusing on adequate hydration, consuming a variety of animal products, and considering supplementation, it may be possible to overcome these deficiencies and prevent constipation while on the carnivore diet.
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Low vitamin D and A levels
The carnivore diet is a meat-only diet that includes only animal-based foods such as meat, fish, eggs, and certain dairy products. It is devoid of plant-based foods, including fruits, vegetables, nuts, seeds, and grains.
The diet is high in fat and protein and low in carbohydrates and fiber. This change in diet can lead to constipation, which is a common condition characterized by infrequent bowel movements, difficulty passing stools, and sometimes abdominal discomfort.
One of the reasons for constipation on the carnivore diet is dehydration. The carnivore diet is low in carbohydrates, which attach to water and are expelled through urine. This can lead to dehydration, pulling water out of the colon and making it difficult to pass stools.
Another reason for constipation could be a lack of fiber in the diet. However, new research suggests that fiber may not be as important as previously thought and that reducing fiber intake may actually reduce constipation.
To avoid constipation on the carnivore diet, it is important to stay hydrated by drinking enough water and consuming electrolytes. Some recommend drinking 2 liters of water per day, while others suggest up to 2.5 liters, especially during the transition to the carnivore diet. Larger individuals may need to increase their water intake even more.
In addition to staying hydrated, consuming enough salt is important. Doctors recommend consuming 12 grams (2 teaspoons) of salt per day in the first few days of the carnivore diet and then reducing to 5 grams (1 teaspoon) per day to avoid constipation.
While vitamin D and A deficiencies can contribute to constipation, the carnivore diet is typically high in vitamin D, which is found in animal products like fatty fish, egg yolks, cheese, pasture-raised pork, and beef liver. Sun exposure is also an important source of vitamin D.
Overall, while the carnivore diet may cause temporary digestive discomfort, including constipation, there are ways to mitigate these issues by staying hydrated, consuming enough electrolytes and salt, and ensuring adequate vitamin D and A levels.
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Frequently asked questions
The carnivore diet is a dietary approach that involves eating only animal-based foods and eliminating most or all plant-based foods. This includes meat, fish, eggs, and some dairy products.
Yes, the carnivore diet can cause constipation due to the reduced fibre intake and higher fat intake. However, some proponents of the diet claim that a lack of fibre improves digestion.
The carnivore diet is extremely restrictive, which can lead to potential deficiencies in essential nutrients, including vitamins C, E, and folate. It can also negatively impact gut health by decreasing gut microbiota diversity, as gut bacteria starve due to a lack of fibre.
To prevent constipation, ensure you are staying hydrated by drinking enough water and consuming electrolytes. You can also incorporate more fats into your diet, such as fattier cuts of meat, butter, or ghee, as fats aid in smoother bowel movements. Bone broth is also recommended, as it is rich in nutrients and can aid in gut healing.











































