PSYLLIUM SEED HUSK (PILL FORM)?

Barbiedoll89 asked: I heard that it’s fiber & it helps regulate bowel movements & even help you lose weight! but i don’t understand why you have to drink a 2 glasses fo water when & after taking it (pill form & powder form)
WHY?
AND ALSO I’M A BIT CAUTIONS ABOUT TAKING THE PILLS FORM, IT SAYS [...]