Psyllium husks, the outer portion of the psyllium seed, is water soluble and used in a variety of supplements and recipes. They are not, however, calorie-free, so you need to count your intake, just as you do with your other food.
The standard serving size for psyllium husks is 1 tbsp. of husks, which weighs about 0.2 oz. One tbsp. of psyllium husks has 16 calories.
Calories from Carbohydrates
Each g of carbohydrates has 4 calories. As part of a grain, it’s not surprising that psyllium husks have 4 g of carbohydrates and, thus, all of their calories are from carbohydrates.
Psyllium husks are used as a source of fiber and can be added to a variety of food and beverages. In addition, they’re used in gluten-free baking to help bind the flour together. In either case, you should count the amount of psyllium husks you use to prevent underestimating your daily calorie intake.