Thunderbrook Psyllium Husk Pure, is pharmaceutical grade psyllium husk. Psyllium is the same main active ingredient used in many sand-removing supplements, but without the fillers, bran, pelleting agents, and is a lot more economical too! Psyllium is a main ingredient in Thunderbrook Gut Cleanse formula, with added herbs and biotech yeasts to assist its action and help soothe the gut as the sand is moved out. Feeding Guidlines50-100g per day