Moira said: >Cascara is supposed to be a natural laxative, I read about it on the keto list. It is natural, it may cause cramping, and is not to be used frequently, as it can become addictive--colon won't work without it--Aloe vear juice works well softens the stools. Make sure your son drink lots of water, what about vegetables, they are high in fiber and low in carbs so wouldn't cause a reaction. Psyllium is a seed not a grain. If I remember correctly its in the plantain family.