hi hart - i'm afraid i haven't heard of zelmac. But i would be interested if anyone else had - i have troubles with incomplete evacuation too - it's the pits isn't it?maybe you should try another thread with 'zelmac' as the subject heading?
Irritable Bowel Syndrome and Digestive Health Support Forum
A forum community dedicated to Irritable Bowel Syndrome and Digestive Health Support. Come join the discussion about treatment, diet, health, lifestyles, spirituality, medication, research, recovery, and more!