5. Vitamin A
There are many good sources of vitamin A, whether you decide to get yours from carrots (which incidentally, are also a good source of fiber) or you decide to supplement with it. Vitamin A is useful because it can act as a digestive enzyme, or more specifically a catalyst for digestive reactions.
This means that it can help to break down your food more before it makes it into the bowels in the first place and it can also help to break down your stool!