I think it is essential to take one. The problem is in finding what works for you. I have little empathy for this step since I have been on Fibercon for so many years I can't remember what it was like to start! But I have increased the dose a lot this year and did just fine.
-------------------- IBS-A for 20 years with terrible bloating and gas. On the diet since April 2004. Remember this from Heather's information pages:
"You absolutely must eat insoluble fiber foods, and as much as safely possible, but within the IBS dietary guidelines. Treat insoluble fiber foods with suitable caution, and you'll be able to enjoy a wide variety of them, in very healthy quantities, without problem." Please eat IF foods!