One of the most common concerns about the ketogenic diet is whether it provides enough dietary fibre. With most high-fibre foods like grains, legumes and many fruits being restricted, it’s a valid question. The good news is that keto can absolutely provide adequate fibre — you just need to know where to look.
Dietary fibre is essential for: healthy digestion and regular bowel movements, feeding beneficial gut bacteria (prebiotic function), reducing cholesterol levels, regulating blood sugar (though this is already managed through carb restriction on keto), and reducing the risk of colorectal cancer. Insufficient fibre can cause constipation — one of the more common side effects of poorly planned keto diets.
The best low-carb, high-fibre foods for keto include: Chia seeds (10g fibre per 28g serving), flaxseeds/linseeds (8g per 28g), psyllium husk (7g per tablespoon), avocado (7g per whole avocado), broccoli (3g per 100g), spinach (2g per 100g), courgette (1g per 100g), almonds (3.5g per 28g), and coconut flour (10g per 28g).
NHS guidelines recommend 30g of fibre daily. While keto dieters may fall slightly below this, consistently including leafy greens, seeds and low-carb vegetables can get you close. Psyllium husk supplements are a popular keto-friendly way to boost fibre intake significantly. Explore our fibre-rich keto main dish recipes and check our keto snack ideas featuring nuts and seeds.