Madeleine Hull
No-carb diets, such as the ketogenic (keto) diet, can cause diarrhea. This is because the body switches from using carbohydrates for energy to using fat, which can be harder to digest. The keto diet is also often high in protein, which can also cause digestive distress. Additionally, the artificial sweeteners and sugar alcohols in many keto products can have a laxative effect. Other factors that can contribute to diarrhea on a keto diet include coconut-based fats, taking too much magnesium, and pre-existing digestive issues. While diarrhea can be a common side effect of a no-carb diet, it is usually fleeting and can be managed by staying hydrated and making gradual dietary changes.
| Characteristics | Values |
|---|---|
| Diarrhea caused by | Increase in fat intake, decrease in fiber intake, change in gut bacteria, sugar alcohols, too much protein, the wrong source of dietary fats, artificial sweeteners, butyrate and zinc deficiencies, increase in bile acid production, lactose intolerance |
| Diarrhea remedies | Staying hydrated, consuming electrolytes, reducing protein intake, probiotic supplements, fermented foods, increasing fiber intake, reducing dairy consumption, reducing magnesium intake, easing into the diet |
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What You'll Learn
The keto diet and its link to diarrhea
The keto diet is a low-carb, high-fat eating plan that consists of less than 5% carbohydrates, 10-30% protein, and 65-90% fat. The idea is to help the body switch from using carbohydrates for energy to using fat, a process called ketosis. While the keto diet may have benefits like improved blood sugar control and weight loss, it also has some drawbacks, with one of the most common side effects being keto diarrhea.
Keto diarrhea is characterized by loose, watery stools and can be caused by several factors, including an increase in fat intake, a decrease in fiber intake, and changes in the types of food eaten. Fat is harder for the body to digest than protein or carbohydrates, and it takes longer. When the body cannot digest and absorb fats normally, they are broken down in the colon into fatty acids, which can trigger diarrhea. Additionally, the keto diet can starve gut bacteria of their primary source of fuel, leading to "die-off" symptoms as the bacteria die out and are expelled from the body, sometimes via diarrhea.
Artificial sweeteners and sugar alcohols, commonly used in keto products, can also lead to diarrhea as they are not effectively absorbed in the gut and can have a laxative effect. Coconut-based fats, such as MCT oil or coconut oil, are also known to have a laxative effect and can cause diarrhea in some people. Another cause of keto diarrhea may be a buildup of toxic byproducts like ammonia in the digestive tract due to consuming more protein than the body can break down.
To avoid keto diarrhea, it is recommended to stay properly hydrated, especially during the initial phase of the diet when the body is adjusting. It is also important to be mindful of dairy consumption, as dairy is known to cause GI upset. Probiotic supplements and fermented foods like sauerkraut can help balance the microbiome. If diarrhea persists or is severe, it is advised to consult a doctor, as it may be due to underlying health issues, food intolerances, or allergies.
In summary, the keto diet can lead to diarrhea due to various factors such as increased fat intake, decreased fiber, artificial sweeteners, coconut-based fats, and high protein consumption. Proper hydration, avoiding certain foods, and supporting the gut microbiome can help prevent keto diarrhea. However, if diarrhea persists, it is important to seek medical advice.
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High-fat content in the keto diet
The keto diet is a low-carb, high-fat diet. It involves drastically reducing carbohydrate intake and replacing it with fat. This reduction in carbs puts the body into a metabolic state called ketosis, where the body uses fat for fuel instead of carbohydrates. The keto diet typically contains 70% fat, although this can be as high as 90% of daily calories.
The keto diet is associated with an increase in "bad" LDL cholesterol, which is linked to heart disease. It is also high in saturated fats, which are linked to an increased risk of heart disease. Because of the high fat content, followers of the keto diet must eat fat at every meal.
The keto diet can cause diarrhea, which is a common side effect of low-carb diets. This is because fat is harder for the body to digest than protein, starches, or sugars, and takes longer. This can put more stress on the digestive system, causing diarrhea, gas, bloating, and other symptoms. The keto diet can also cause constipation, due to the lack of fiber.
The keto diet may also include increased amounts of dairy, which can cause diarrhea for those who have trouble digesting lactose. The artificial sweeteners and sugar alcohols in many keto products can also have a laxative effect, leading to diarrhea.
There are several ways to avoid diarrhea while on the keto diet. Staying properly hydrated is crucial, as the shift from carb-burning mode to fat-burning mode causes the body to flush water, which can speed up transit times and result in diarrhea. It is recommended to drink 2-2.5 liters of water per day.
Another cause of diarrhea can be a deficiency in certain nutrients, such as zinc and butyrate. Ensuring adequate intake of these nutrients can help prevent diarrhea.
Finally, the time it takes for the body to adjust to digesting high amounts of fat can also cause diarrhea. This type of diarrhea usually resolves with time as the body adjusts.
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Low-carb diets and fiber intake
Low-carb diets are often associated with a decrease in fiber intake, which can lead to digestive issues such as constipation and diarrhea. Fiber is essential for maintaining regular bowel movements and promoting a healthy digestive system. While it may seem challenging to include enough fiber in a low-carb diet, it is possible to do so with the right food choices.
High-Fiber, Low-Carb Foods
There are several tasty and nutritious foods that are both low in carbohydrates and high in fiber. Here are some examples:
- Cauliflower: A versatile vegetable that can be used as a substitute for starchy carbs like rice and potatoes. It is high in fiber, vitamins, and minerals.
- Broccoli: Another cruciferous vegetable that is high in fiber, folate, potassium, and vitamins C and K.
- Spinach: A superfood rich in lutein and zeaxanthin for eye health, and also provides 4 grams of fiber per cup.
- Chia seeds: A plant-based source of omega-3 fatty acids, fiber, and various vitamins and minerals.
- Flax seeds: Packed with omega-3 fatty acids, fiber, and antioxidants, while also being low in digestible net carbs.
- Avocado: Avocados are known for their healthy fats but also provide a good amount of fiber.
- Berries: Blackberries, raspberries, and other berries are not only low in calories but also provide essential vitamins, minerals, and fiber.
Tips for Increasing Fiber Intake on a Low-Carb Diet
When following a low-carb diet, here are some tips to ensure adequate fiber intake:
- Choose whole grains: Opt for whole grains instead of refined grains to increase your fiber intake and obtain other important nutrients.
- Include a variety of high-fiber foods: Incorporate a variety of vegetables, nuts, seeds, and whole grains to get different types of fiber and nutrients.
- Swap animal-based proteins for plant-based sources: Consider replacing some animal proteins with fiber-rich options like nuts, seeds, and beans.
- Increase fiber gradually: To avoid digestive issues like gas and bloating, introduce high-fiber foods slowly and gradually into your diet.
- Stay hydrated: Drink plenty of water when consuming high-fiber foods or supplements to avoid constipation and ensure proper digestion.
Potential Digestive Issues
While a low-carb diet can offer various health benefits, it is important to be aware of potential digestive issues that may arise due to reduced fiber intake or other factors. These issues include:
- Diarrhea: Low-carb diets can lead to diarrhea due to decreased fiber intake, increased fat intake, or changes in gut bacteria.
- Constipation: Insufficient fiber can contribute to constipation, as fiber adds bulk to stools and softens them for easier passage.
- Stomach upset: A high-protein diet may stress the digestive system, leading to stomach discomfort.
- Lactose intolerance: A high-protein or high-fat diet may include more dairy, causing diarrhea in individuals with lactose intolerance.
- Artificial sweeteners: Sugar substitutes commonly used in low-carb diets can have a laxative effect, contributing to diarrhea.
In conclusion, while a low-carb diet may cause diarrhea and other digestive issues, ensuring adequate fiber intake through high-fiber, low-carb foods and following the provided tips can help mitigate these problems. It is important to listen to your body, make gradual dietary changes, and prioritize a balanced and nutritious diet.
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Artificial sweeteners and sugar alcohols
Artificial sweeteners are created from chemicals in a lab or derived from natural substances like herbs. They are regulated by the U.S. Food and Drug Administration (FDA) and are generally regarded as safe. However, they do not contain beneficial nutrients like vitamins, fibre, minerals, or antioxidants. Some common artificial sweeteners include saccharin and aspartame.
Sugar alcohols, also known as polyols, are ingredients used as sweeteners and bulking agents. They occur naturally in foods, especially in plant products such as fruits and berries. Sugar alcohols provide fewer calories than regular sugar because they are converted to glucose more slowly and do not cause sudden increases in blood sugar. Common sugar alcohols include mannitol, sorbitol, xylitol, lactitol, isomalt, maltitol, and hydrogenated starch hydrolysates (HSH).
The excessive consumption of sugar alcohols can lead to potential side effects such as bloating and diarrhoea. This is because the body does not absorb sugar alcohols well, and they can have a laxative effect. The American Diabetes Association recommends consuming sugar alcohols in moderate amounts to avoid these issues.
It is important to note that while a no-carb diet may include artificial sweeteners and sugar alcohols, completely removing all carbohydrates and sugars from your diet can be harmful to your health. Our bodies require sugar as fuel, and a sudden absence of it can lead to "keto flu" symptoms such as headaches, fatigue, and brain fog. Therefore, it is recommended to reduce the intake of highly refined foods and beverages with added sugars and artificial sweeteners rather than eliminating all carbohydrates.
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Gut bacteria and the keto diet
The keto diet is a high-fat, very low-carb diet. Meals are typically 70–80% fat and around 5–10% carbs. The diet is designed to force the body to alter its metabolism, using fat molecules as its primary energy source instead of carbohydrates, and producing ketone bodies as a byproduct.
The keto diet has been found to have a significant impact on the microbes residing in the human gut, collectively referred to as the gut microbiome. The gut microbiome is the collection of bacteria and other microbes that live in the gut.
A 2020 study by UC San Francisco found that as the diet shifted towards stricter carbohydrate restriction, the gut microbes also began to shift, correlating with a gradual rise in ketone bodies. The researchers also found that even in mice eating normal amounts of carbohydrates, the presence of added ketones was enough to produce many of the specific microbial changes seen in the ketogenic diet.
Another study, published in 2020, found that the keto diet caused shifts in Actinobacteria, Bacteroidetes, and Firmicutes. In particular, beneficial Bifidobacteria species decreased the most in response to reductions in carbohydrates. This decrease in Bifidobacteria species was found to reduce the number of Th17 immune cells, which help fight infections but also promote inflammation in autoimmune diseases.
The keto diet has also been linked to diarrhea, as the body adjusts to digesting high amounts of fat, which can lead to slight malabsorption diarrhea. This is also caused by the time it takes to produce bile acids, which are needed to break down lipids. The keto diet can also cause diarrhea as the gut bacteria begin to die out and need to be expelled.
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Frequently asked questions
A no-carb diet is a diet that consists of little to no carbohydrates and is often high in fat and protein. An example of a no-carb diet is the keto diet, which consists of less than 5% carbs, 10-30% protein, and 65-90% fat.
Yes, a no-carb diet can cause diarrhea. This is often due to the body's adjustment period to digesting high amounts of fat, which can lead to malabsorption and diarrhea. The keto diet, for example, is known to cause "keto diarrhea" in some people.
To prevent diarrhea, it is important to stay hydrated and replenish electrolytes. It is also recommended to be mindful of dairy consumption and to limit the use of artificial sweeteners, which can have a laxative effect. Additionally, giving your body time to adjust to the diet and consulting a doctor or nutritionist can help prevent diarrhea.
