Hard water, food fibre, and silicon.
D001161:Arteriosclerosis / Q000517:prevention & control*; D001168:Arthritis / Q000517:prevention & control; D002482:Cellulose / Q000032:analysis; D004043:Dietary Fiber / Q000032:analysis; D006801:Humans; D012825:Silicon / Q000032:analysis*; D014881:Water Supply / Q000032:analysis*
D004043:Dietary Fiber; D002482:Cellulose; D012825:Silicon