I started taking my protein shakes again today but I have noticed that I am having problems breathing this p.m. after lunch. There is a lot of fiber in the shakes and now I am wondering that maybe I should have taken half the amount for awhile and then add it after I adjust. I feel a bit of a tightness in my chest and a hard time catching a deep breath. I ate a sandwich and a small salad for lunch and I think it has all been way too much today. I hope this feeling passes soon...YUK