Embarking on a low carb diet, especially the keto regime, promises numerous health benefits such as improved blood sugar regulation and potential protection against heart disease. 

However, while fats and proteins often dominate the spotlight, the essential role of dietary fiber tends to be overshadowed. As carb-rich foods often get limited, the importance of consuming more fiber is magnified. 

Beyond supporting gut health, fiber is crucial for managing blood pressure, maintaining heart health, and optimizing overall well-being. Navigating the keto landscape means discovering high-fiber gems, from cruciferous vegetables to powerhouse seeds.

Why Is Fiber Important on the Keto Diet?

The keto diet has taken the world by storm with its potential health benefits and weight loss opportunities. However, as with any diet, there are considerations to bear in mind. The importance of fiber on the keto diet cannot be emphasized enough. 

Dietary guidelines suggest an adult’s daily fiber intake should be substantial, but many on the low carb diet struggle to meet these requirements, leading to “keto constipation“. 

By ensuring an adequate fiber intake, keto dieters can promote digestive health, reduce the risk of chronic diseases, and support gut health.

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Does Fiber Kick You Out of Ketosis?

Many following the ketogenic diet fear that consuming too much fiber will interrupt their state of ketosis. However, dietary fiber doesn’t directly alter blood ketone levels. 

Instead, it’s the net carbs – which are the total carbs minus fiber – that are of utmost importance. Consuming high fiber low carb foods can, therefore, benefit keto dieters without the risk of breaking ketosis.

Fiber Intake and Keto Diet: How Much Do You Need?

Ensuring proper fiber intake on a keto diet is crucial for optimal health benefits. Men typically require about 38 grams of fiber daily, while women need roughly 25 grams.

Regrettably, statistics show that most individuals in the USA fall short of these recommendations. A low fiber diet has been linked to a plethora of health issues, from heart disease to digestive challenges. Thus, even when focusing on low carb foods, monitoring one’s daily fiber intake remains essential.

Best High Fiber Foods

Dietary fiber, an essential component found predominantly in plant foods, can be categorized into two primary types: insoluble fiber and soluble fiber. Both forms play crucial roles in our health, but they function differently within our bodies. For those embracing a keto diet, balancing these fibers becomes even more critical for optimal health.

Insoluble fiber

Insoluble fiber doesn’t dissolve in water. Instead, it adds bulk to the stool and facilitates the swift movement of food and waste through the digestive system. This kind of fiber can be immensely beneficial for individuals looking to relieve constipation or those with irregular stool patterns. The action of insoluble fiber is often likened to a broom, sweeping through the digestive tract and helping prevent digestive system-related ailments. Key sources of insoluble fiber include whole grains, nuts, and certain vegetables.

Soluble fiber

Contrary to its insoluble counterpart, soluble fiber dissolves in water and forms a gel-like substance in the gut. This type of fiber has been linked to various health benefits, especially for heart health. It binds to dietary cholesterol and helps to excrete it, potentially reducing blood cholesterol levels. Furthermore, soluble fiber can stabilize blood sugar levels by slowing the absorption of sugar. This can be particularly beneficial for people on a low carb diet, as blood sugar control becomes paramount. Foods like oats, beans, and some fruits and vegetables are rich in soluble fiber.

For those on the keto diet, it’s essential to understand that while whole grains are rich in insoluble fiber, they might be too carb-heavy for regular consumption. However, plenty of low carb vegetables and seeds can help meet the daily requirements of both insoluble and soluble fiber.

Top 16 Fiber Rich Foods

A ketogenic, or keto diet, emphasizes high fat and low carbohydrate intake. However, just like any other diet, getting adequate fiber is paramount. Not only does fiber support digestive health, but it also offers myriad other health benefits. Here, we’ve listed some of the best high fiber foods that fit seamlessly into a keto regimen.

Chia seeds

100 g: 42.1g carbs, 34.4g fiber

Benefits: These tiny seeds offer an impressive array of nutrients, notably Omega-3s, which are known for supporting brain and heart health. Furthermore, the calcium present helps fortify bone health, and magnesium aids muscle function. Being a great source of fiber, adding chia seeds to your keto diet can be an excellent way to boost your daily fiber intake.


100 g: 28.9g carbs, 27.3g fiber

Benefits: Similar to chia seeds, flax seeds are powerhouses of nutrients. The Omega-3s present support heart health, while the lignans have antioxidant properties. Additionally, the magnesium content contributes to nerve function.


100 g: 8.53g carbs, 6.7g fiber

Benefits: Avocado is not just about healthy fats. They’re also rich in fiber, especially for a fruit. With high amounts of potassium, they support heart health, while the folate ensures optimal cell function. The vitamin E present is excellent for skin health.


100 g: 21.7g carbs, 12.5g fiber

Benefits: Almonds, being a tree nut, are packed with Vitamin E, which acts as an antioxidant. The magnesium content aids muscle function, and they’re a good source of calcium for bone health.


100 g: 30.2g carbs, 0.9g fiber

Benefits: While cashews have fewer grams of fiber compared to some other nuts, they’re an excellent source of magnesium which promotes bone health. The iron present ensures optimal blood health, and zinc is crucial for immune function.


100 g: 6.64g carbs, 2.6g fiber

Benefits: This cruciferous vegetable is a treasure trove of nutrients. Vitamin C boosts immune function, Vitamin K aids in blood clotting, and folate is essential for DNA synthesis.


100 g: 3.63g carbs, 2.2g fiber

Benefits: Spinach stands out for its iron content, vital for energy production. It’s also a good source of Vitamin K for bone health and Vitamin A which benefits eye health.

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Brussels sprouts

100 g: 8.95g carbs, 3.8g fiber

Benefits: Another member of the cruciferous family, brussels sprouts are rich in Vitamin C, beneficial for skin health, Vitamin K, essential for wound healing, and folate, which promotes brain health.


100 g: 3.88g carbs, 2.1g fiber

Benefits: Asparagus isn’t just a tasty side dish. It is rich in nutrients, with folate promoting heart health, Vitamin K ensuring strong bones, and Vitamin A supporting immune function.


100 g: 8.75g carbs, 2.0g fiber

Benefits: Often dubbed a superfood, kale is loaded with Vitamin K, benefiting heart health. It’s also a significant source of Vitamin C, acting as an antioxidant, and Vitamin A, which is vital for vision.

Green beans

100 g: 7.13g carbs, 2.7g fiber

Benefits: These vibrant vegetables provide an abundance of Vitamin C, essential for collagen formation. With Vitamin K, they aid in bone mineralization, and their folate content is crucial for cell division.


100 g: 4.97g carbs, 2.0g fiber

Benefits: A favorite amongst keto dieters for its versatility, cauliflower is high in Vitamin C, acting as an antioxidant. It also provides Vitamin K, beneficial for reducing inflammation, and choline, which promotes brain health.

Coconut (unsweetened)

100 g: 15.23g carbs, 9.0g fiber

Benefits: Apart from being a delightful treat, unsweetened coconut provides MCTs that can be used for energy, particularly on a high-fat diet like keto. Moreover, its fiber aids digestion, and the iron present ensures effective oxygen transport.


100 g: 9.00g carbs, 5.3g fiber

Benefits: Blackberries are a sweet way to up your fiber intake. They’re packed with Vitamin C, promoting skin health, Vitamin K ensuring bone health, and manganese, acting as an antioxidant.


100 g: 11.94g carbs, 6.5g fiber

Benefits: Another berry making the list, raspberries offer Vitamin C, beneficial for wound healing. Their high fiber content promotes heart health, and the manganese present is vital for bone formation.


100 g: 13.71g carbs, 6.7g fiber

Benefits: Walnuts are not just a crunchy snack. They’re brimming with Omega-3s that aid brain function, antioxidants for cell protection, and magnesium, which ensures muscle relaxation.

Top 16 best high fiber Keto Food List Infographic

Integrating these high-fiber low-carb foods into your keto diet can have profound health benefits, especially when it comes to digestive health and maintaining steady blood sugar levels. When planning meals, always be conscious of the grams of net carbs to ensure you remain in ketosis while still reaping the benefits of a high-fiber intake.

Other Sources of Fiber on Keto

When you’re on the keto diet, it’s not just the common veggies or seeds that can help you meet your daily fiber intake. There are alternative sources that can effectively boost your dietary fiber while keeping the carb count low. Incorporating these into your daily meals can be a game-changer, especially if you’re aiming to maximize the benefits of fiber without going over your carb limits.

Psyllium husk

Psyllium husk is a potent source of soluble fiber. Renowned for its positive effects on gut health, it can act as a prebiotic, fostering the growth of beneficial bacteria in the digestive tract. When consumed, it swells up in the stomach, which can help induce feelings of fullness – crucial for those pursuing weight loss on the keto diet.

ColonBroom stands out because it’s not only enriched with psyllium husk but is also meticulously crafted to align with keto principles. Its keto-friendly composition ensures that it won’t kick you out of ketosis. In addition, ColonBroom is suitable for vegans and is designed to work seamlessly with both ketogenic diets and intermittent fasting regimens.

Beyond its application as a thickening agent in low-carb foods and recipes, like keto bread, psyllium husk can also be incorporated into smoothies for an immediate fiber boost.

Acacia fiber

Acacia fiber, a soluble fiber, offers impressive health benefits. It is known for supporting gut health, as it promotes the growth of beneficial gut bacteria. This fiber type can also help in maintaining steady blood sugar levels, which is essential for those on a low-carb diet aiming for blood sugar control.

It’s commonly found in powder form and can be mixed into drinks, sprinkled on foods, or used in keto-friendly baking to enhance the fiber content without adding very few calories.

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Best High-Fiber Keto Foods to Add to Your Diet: Key Takeaways

Understanding and increasing your fiber intake on the keto diet is paramount for anyone serious about reaping the health benefits of this lifestyle. Not only does getting enough fiber support digestive health, but it also plays a pivotal role in aiding blood sugar control. Moreover, it becomes an essential tool in a high fiber diet to prevent chronic diseases and enhance nutrient absorption.

With keto’s emphasis on monitoring grams of net carbs, it’s easy to overlook the importance of fiber. But those who actively eat fiber-rich foods find that their journey to weight loss is smoother and more sustainable. After all, high fiber diets have long been associated with a plethora of health benefits.

Given the increasing popularity of low carb diets like keto, ensuring you increase fiber intake becomes even more crucial. It not only optimizes gut health but also supports metabolic functions, boosting overall well-being.

Always remember, though, as you explore the world of low carb diets and aim to strike the right balance between fat, protein, and carbs, consulting your healthcare provider is invaluable. Especially when making significant dietary changes, they can guide you on safely incorporating new sources of fiber and ensuring your diet

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