My gastroenterologist suggested Millers Bran which is in the grocery store cereal dept. altho it is NOT a cereal but one puts about 1/4th cup IN the morning cereal. That worked for me for a long time but finally I needed something more so he told me to take l or 2 Fiber-Con tabs as Metamucil causes a lot of gas. Phillips MO is good if you have hemorrhoids but it can get messy..causing runny stools. Magnesium tabs are excellent..2 twice a day. I am 86 ys old.