Hi, my GI Doctor prescribed librax medication about three months ago to control IBS issue i' m having, he also suggested I should take Metamucil daily to relieve any constipation, he recomended I take 1 tablespoon daily. The metamucil has been working great, but the concern that I have is my weight lost. Right now i' m at 150 lbs i' m 5' 10. I have been at that weight for two months now. I know the weight is on the low side, but feel healthy, look good. The problem I have people always mention how thin I look now compared to five months when I had a poor diet and drank way too much beer a 36 pack a week. I been to the doctor they have performed every blood test available and they all come back normal. I would also like to mention that I have been on a really good diet for six moths now( I eat lots of fruits, veggies, beans, salads, cereal with lots of fiber low sugar, chicken breast daily, and plenty of 80 to 130 oz a day.) I stay away from soda and processed foods. I know if consult a doctor he might just place on a stress medication. The question I have. Do you think it' s the metamucil keeping my weight low? and Does any have a similar problem?