psyllium husk are "an ideal source of fibre for those that have an intollerance to wheat. psyllium husks are tottally natural & safe"
they have no cals no carbs & no fat in them.
they will not bring you out of ketosis & are brill at thickening your shakes & soups, just remember to drink extra water & it helps with the number 2's problem
hope this of help