Is pure psyllium husk powder as good as manufactured products such as metamucil to maintain daily bowel regularity? how much should be taken daily?

Fermented...: Many fibers, particularly the water insoluble kind (psyllium) are readily fermented by your gut flora ; may cause bloating/gassiness. Choose your favorite depending on your tolerance to taste, texture, volume, dosing. If your goal is bowel regularity, remember that normal stool frequency fits a spectrum from 3-4 movements/day to one every 3-4 days. Dose is individualized, as dietary fiber varies.