Janet,
Each time I have tried it has been just shy of three weeks before I end up giving it up to get my gut to calm down. I normally give a supplement at least three tries becuase I never know when the IBS or colitis will flare. I may just try the flax seed oil to see if my body will be able to handle it. It is common for some odd reason for vitamins and supplements to cause me problems but I never know what will happen until I give them a try.
Brent