
The ketogenic diet is a high-fat, low-carb, and moderate-protein eating pattern that induces a phenomenon called ketosis, where the body burns fat instead of glucose for energy. While it is a popular dieting trend due to its weight loss benefits, it may also cause constipation, especially during the transitional period. This is because the keto diet includes foods that are notoriously difficult to digest, such as nuts, low-starch vegetables, and full-fat dairy products. However, there are ways to prevent constipation while on the keto diet, including staying hydrated, increasing fibre intake, and exercising regularly.
How to prevent constipation on a ketogenic diet
| Characteristics | Values |
|---|---|
| Drink more water | Aim for light-coloured urine |
| Increase non-starchy, fibrous vegetable intake | Leafy greens, broccoli, nuts, seeds, berries, avocados, low-carb fruits like cucumbers, tomatoes, squashes, okra, and olives |
| Exercise more | Light cardio (biking, swimming, hiking), resistance training, yoga, pilates, walking after meals |
| Electrolytes | Magnesium, potassium, sodium |
| Probiotics | Kefir, kimchi, probiotic supplements |
| Sugar-free candy | Sugar alcohols act as mild laxatives |
| Transition slowly to the keto diet | Gradually reduce carbohydrates |
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What You'll Learn

Drink more water
Staying hydrated is essential for preventing constipation, especially when following a ketogenic diet. Dehydration is a common cause of constipation, so drinking enough water can help prevent or relieve it.
When following a ketogenic diet, it is important to be mindful of fluid intake. This is because the diet often involves reducing carbohydrate sources, such as whole grains, rice, pasta, and certain fruits, which are also sources of dietary fibre. Therefore, it is crucial to ensure adequate hydration to support regular bowel movements.
To stay hydrated, aim to drink water regularly throughout the day. It is recommended to have light-coloured urine as a guide to adequate hydration. Drinking warm or room temperature water can also be beneficial. In addition to water, herbal tea, green tea, and bone broth are hydrating options. However, it is important to be mindful of caffeine intake, as excessive caffeine can lead to dehydration and sodium loss.
Along with hydration, consuming fibre-rich foods is crucial. While the ketogenic diet may reduce fibre intake, there are still many low-carbohydrate sources of fibre, such as leafy green vegetables, nuts, seeds, and low-carb fruits like cucumbers and avocados.
By staying hydrated and including fibre in your diet, you can help prevent constipation while following a ketogenic diet.
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Eat more fibre-rich foods
The keto diet is a very high-fat, very low-carb, and moderate-protein eating pattern. It can result in weight loss, but it may also cause constipation. This is especially true when transitioning from a previous diet, as your body adjusts to digesting more fats and fewer carbs.
To prevent constipation, it is recommended to eat more fibre-rich foods. The Academy of Nutrition and Dietetics recommends 25 grams of fibre per day for women and 38 grams for men. Good sources of low-carb fibre include:
- Above-ground vegetables, such as leafy greens, broccoli, and low-starch vegetables like cucumbers, tomatoes, squashes, avocados, okra, and olives.
- Nuts and seeds, such as macadamia nuts, chia seeds, flaxseeds, and psyllium.
- Small amounts of lower-carb fruits, such as berries and raspberries.
It is important to note that these fibre-rich foods should be consumed in combination with other constipation prevention strategies, such as staying hydrated, increasing physical activity, and transitioning to the keto diet slowly.
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Exercise regularly
Exercise is an important part of preventing constipation, especially when following a ketogenic diet. The keto diet is a very high-fat, very low-carb, and moderate-protein eating pattern that induces a phenomenon called ketosis, where your body burns fat instead of glucose for energy. While this can lead to weight loss, it can also cause constipation as a side effect, especially during the transition period.
To prevent constipation, it is recommended to increase physical activity and, in particular, aerobic exercise. Light cardio exercises such as biking, swimming, and hiking are suitable options to improve constipation symptoms. Resistance training and flexibility workouts like yoga or pilates can also be beneficial. Taking a short walk after every meal is a helpful tip to improve digestion and promote weight loss.
In addition to exercise, staying hydrated is crucial. Drinking plenty of water throughout the day and aiming for light-coloured urine can help prevent constipation. Consuming caffeinated teas, organic coffee, and bone broth can also contribute to hydration. However, excessive caffeine may lead to dehydration, so moderation is essential.
It is also important to note that transitioning slowly into the keto diet can help prevent constipation. Gradually reducing carbohydrate intake allows the body to adjust and may lessen the likelihood of constipation.
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Eat low-carb fruits
Constipation is a common side effect of starting a ketogenic diet. This is due to the reduced intake of carbs, which are a source of fiber. However, fiber is not the answer to constipation on a keto diet. Instead, it is recommended to increase your intake of non-starchy, fibrous vegetables, drink enough water, and move more.
A keto diet is a very low-carb, high-fat, and moderate-protein eating pattern. It induces a phenomenon called ketosis, where the body burns fat instead of glucose for energy. While it may help burn fat, it can also cause constipation.
One way to prevent constipation while on a keto diet is to eat low-carb fruits. Here are some tips and food choices to help you include low-carb fruits in your keto diet:
- Avocados: Avocados are a great source of healthy fats and are low in net carbs, with only 8.5 grams of carbs and 6.7 grams of fiber per 100 grams. They are also packed with essential nutrients like vitamin C, vitamin K, potassium, and folate.
- Berries: Raspberries, strawberries, and blueberries are excellent low-carb berry choices. They are high in antioxidants and low in sugar compared to other fruits. A 100-gram serving of raspberries contains 11.9 grams of carbs, while a 1-cup serving of strawberries provides 11.7 grams of carbs and 3 grams of fiber.
- Melons: Watermelon and cantaloupe are low-carb and high-water-content fruits. Watermelon has 7.5 grams of carbs per 100 grams, while cantaloupe has 8 grams of carbs per 100 grams. They are also rich in vitamins and minerals, including vitamins A, C, and folate.
- Peaches: Peaches are considered suitable in moderation on a keto diet. A medium peach contains 14.3 grams of carbs, while a 100-gram serving has 8-9.5 grams of carbs.
- Olives: Olives are higher in fat than carbs, with 6 grams of carbs per 100 grams. They contain antioxidants, monounsaturated fats, and vitamin E, offering heart health benefits and protection against chronic diseases.
- Tomatoes: While technically a fruit, tomatoes are often used as vegetables and are low in carbs. A 100-gram serving contains 3.9 grams of carbs and provides essential nutrients like lycopene, beta carotene, vitamin C, potassium, and folate.
- Plums: Plums are low on the carb count scale, with only 7.6 grams of carbs per medium plum. They are also a good source of potassium, which helps keep high blood pressure and strokes at bay.
Remember to count the carbohydrate content of these fruits and be mindful of portion sizes to ensure they fit within your keto diet.
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Transition to keto slowly
Transitioning to a keto diet can be challenging for your body, and constipation is a common side effect. However, there are ways to mitigate this issue by gradually adopting the keto diet. Here are some detailed tips to help you transition to keto slowly and avoid constipation:
Gradually reduce your carbohydrate intake: The keto diet is an ultra-low-carb diet, and a sudden drop in carbohydrates can be a shock to your body, leading to constipation. Instead, gradually decrease your carb intake over several weeks or months. This gives your body time to adjust and minimizes the risk of constipation.
Increase healthy fats: The keto diet is a high-fat diet, so ensure you are consuming enough healthy fats. However, do this gradually, as a sudden increase in fat intake can also contribute to constipation. Good sources of healthy fats include avocados, nuts, seeds, and olive oil.
Maintain adequate fiber intake: Fiber is essential for digestive health, and a sudden reduction in fiber is a common cause of constipation when starting a keto diet. Focus on getting fiber from whole foods, above-ground vegetables (like broccoli and asparagus), nuts, and seeds. You can also add ground flaxseeds, chia seeds, or psyllium to your meals to boost your fiber intake. Just remember to start with small amounts and increase gradually to avoid upsetting your stomach.
Stay hydrated: Water is crucial for digestion and preventing constipation. Aim to drink plenty of water throughout the day, and limit caffeinated drinks, as they can contribute to dehydration. Additionally, consider drinking a large glass of water when consuming fiber-rich foods to help the fibers reach their full potential in your digestive tract.
Increase physical activity: Exercise, particularly light cardio and aerobic exercise, can help improve constipation. Try taking a short walk after meals to aid digestion and promote regular bowel movements.
Remember, transitioning to keto slowly is a process of listening to your body and making gradual changes. This approach will help you avoid constipation and make the keto diet a more pleasant and sustainable experience.
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Frequently asked questions
Constipation is an uncomfortable decrease in bowel movements that interferes with daily life. It is characterised by hardened faeces that are difficult to pass.
The ketogenic diet is a very low-carb, high-fat diet. Constipation can occur when transitioning to this diet because of the reduction in fibre intake. Fibre is essential for maintaining healthy bowel movements.
To prevent constipation, it is important to stay hydrated and ensure adequate fibre intake. Fibre can be obtained from keto-friendly foods such as non-starchy vegetables, nuts, and seeds. Additionally, regular exercise, especially aerobic exercise, can help prevent constipation.
Yes, it is recommended to consume probiotic-rich foods like kefir and kimchi, as well as staying well-hydrated with warm or room temperature water. Using a stool to raise the knees above the hips while sitting on the toilet can also help reduce constipation.
Constipation usually goes away in a few days or weeks. It depends on how soon your body adjusts to the diet and the remedies you implement for easing constipation.





































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