If you enjoy persimmon pudding with a dollop of whipped cream or like to eat large persimmons raw and sliced, beware of eating too many because they can cause constipation. However, not all persimmons are created equal when it comes to bowel health.
The soft, sweet persimmons, particularly the small variety, used for persimmon pulp for baking may be fine for the bowels. However, the less sweet, larger persimmons that are eating raw have tannins that may keep you from eliminating.
Having a persimmon once in a while may not be problematic, but avoid eating too many of the less sweet ones.