I havent tried metamucil, I just take pysillium husk raw. Also I take one probiotic a day just to help digestion. I find bananas , whole wheat breads , oats and potatoes to be best bulking food. For all my carbs I'll just have them. Also salads make me go more often . So you can see if its the fresh fruits or veggies in your diet thats causing gas and loose stools.