Hi Skinny,I have the same concern, as did my mom when she was around my age(36)--she is also IBS(65 now). Anyways, I've been making alot of homemade yogurt. Tricky at first, but so worth it. I use whole milk, so it ups the calories and I get the benefit of YUM! with probiotics to boot.Avocadoes-very high in calories and the "good fat." They also have an amazingly high amt of minerals like potassium.When I was a heavy D, I drank Ensure everyday. Thought I was helping. If you read the label on Ensure, you'll find sugar and corn syrup. I don't do well with those two additives, so for myself, I quit drinking it. I'm glad you posted this. I hope many people have other tips, because I could use some more too. It's hard to stay at a good weight when you've quit eating all the fattening stuff(starches, pastas, refined sugars, etc)Marie