Psyllium Husk – How To Use On Keto Low Carb Diet? Psyllium husk is a gelatinous gluten-free low carb dietary fiber. One tablespoon of psyllium husk equals 5 grams of carbohydrates and 5 grams of fiber. Therefore, psyllium husk has zero net carbs! Because of this, psyllium husk is a great “no carb” fiber to …