Please be careful with the calorie restriction. 750 is way too low for anyone. I'm new to dealing with IBS but I have had an eating disorder and still deal with related issues to this day. I've spent countless hours researching nutrition and fitness and meet with a nutritionist on occasion. She once gave me a print out noting that a young women that is sedentary (meaning she does not even get out of bed) needs roughly 1400 calories a day just for her body (vital internal organs like your brain, liver, pancreas, heart, etc.) to function properly. From there you really need to take into account your activity level which will up your caloric intake needs. Plus you are quite underweight for 5'8" (don't rely on Hollywood's unrealistic standard...that's where most problems start)....I'm 5'8 too and my nutritionist said at 130 I could stand to gain a few pounds too. At my height, weight and activity level (highly active) my caloric needs to maintain my present are around 2400 (we are all different- genetics, activity level, etc. so from one person to the next caloric requirements can vary quite a bit). That is on the high end for women but I am really active. Just somethings for you to think about. Also, having IBS makes dealing with my eating disorder issues that much harder since we are better off eating more frequently throughout the day. But we have to realize food is fuel for our bodies and if we want to live long, healthy lives our diets are crucial. One last thing I just need to mention on caloric restrictions (sorry to ramble on this topic but it is something very near and dear to me). By restricting your body of needed calories and nutrients you are hurting yourself more in the long run as far as weight goes. Your body takes caloric restriction as starvation and that serves to slower your metabolism and thus your fat burning potential. Your body is like a wood fire.....to keep it burning to need to routinely add more wood....just like to keep your body going to need to routinely nourish it....that's why the smaller, more frequent meals are highly recommended. I hope some of that was of use.