The most popular fiber among folks here seems to be psyllium husk, either Metamucil, Konsyl, or in bulk. It’s worked well for me for 19 years, but some folks don’t care for it. I haven’t heard of it before, but there are two possible mechanisms that I can think of that might conceivably be related to his muscle cramps: 1) fiber supplements will change the water balance in the stool, so someone whose hydration is marginal or whose electrolyte balance is marginal could be pushed passed a tipping point; 2) Some of these will bind with some medications, reducing their effective dose - so consider spacing medications a couple of hours away from fiber intake.

The muscle cramps are due to insufficient hydration, so he should also be looking at what he is doing to stay hydrated.

Hi Scott, Hi CTBarrister.  thanks for your responses.  Scott, he tried Metamucil and wow it worked great.  Thank for the tip! CTBarrister he is aware of how important hydration is.  He's taking Loperamide and drinks a lot and has not has an issue with hydration since except for when he tried the Benefiber and Banatrol.  Not sure what exactly was causing the cramps but can only assume it was the supplements.  Thanks

First of all Hamstring, any developments from intake of any supplements can’t be good at all. So, First of all, try getting a second opinion before taking the supplements any further. I've had one for years, and after going to chiropractic practice, I took a lot of medications but I wasn't able to recover my issue completely. It comes and goes all the time. Then I went to a chiropractor, and I must say that I'm much better now. I considered going to a physiotherapist at first, but I'm glad I went to a Chiro in the end. Chiropractic care was extremely beneficial in assisting me in overcoming a long-standing Hamstring.