Metamucil is a fiber, and comes in powder form and also capsules.
...also with prunes...you are to chew them a lot as they have a tough skin on them and can be hard to digest. As Flower said, prune juice should work well too.
...try celery....carrots...anything high in fiber....I also eat whole grain breads.
*´¨)
¸.•´¸.•*´¨) ¸.•*¨)
(¸.•´ (¸.•` SE