Taking a separate fiber supplement alongside this formula is worth a specific check, given the two fiber sources already included here.
Compare labels for overlapping fiber content, since this formula already combines Konjac Fiber and Prickly Pear Extract, both contributing to the satiety and digestion role of the formula.
Adding a third fiber source on top of these two could increase total daily fiber intake more than expected — worth introducing any additional fiber supplement gradually and watching how you feel.