What if bowel support supplements give me the runs and urgency... then I dial down the number of pills and I won't have a movement for days on end. I don’t know how to strike a balance. Can you help?

You can open the capsule and take a partial dose and slowly ramp up depending on how your bowels react.  It can take some time but most people end up figuring out their dosage when they trust their body and adjust their dosing based on it.  Sometimes starting with less may be better.  Most people's bowels become greatly regulated in this process.