Metamucil tastes awful and often doesn't get the job done right.
Consider Kelloggs Bran Buds or the flake variety but only this brand. It has the correct ratio 4:1 of soluble to insolube fiber. Since I am lactose intolerant I boiled a few ounces of water and pour it over the bran buds to soften them for a few minutes.
I eat a bowlful every morning, and the stool is fine.
This is such good cereal for the stabilization of your stool, that when I get a stomach virus with resulting diarrhea, I can eat an extra bowl later in the day or night and it will take care of it. It's works better than Imodium(haven't used that in years) for me.
I usually eat about 4-6 ozs.(dry) each morning, but you can play with the amount to see what works for you.
Best wishes, Toree