Hi,My cf genes are DF508 and W1282x, and although they say I am NOT pancreatic sufficient, I have NO problem with keeping weight on. I have bad intestinal problems, like intestinal blockages and constipation, even though I take 2 Creon 20's with meals. Any more enzymes, I'd never be able to go to the bathroom. I do take Miralax every night, which is a different kind of laxative, it doesn't stimulate the bowel into moving like harsh laxatives, but it adds sufficient water to the bowel and produces a regular bowel movement. My intestinal problems are worse than my lung function, but almost equal. My FEV1 is in the mid 50's. I've heard that the W1282x is common in jewish people. Also, they say that genotype (what your cf genes are) has nothing to do with phenotype (what your symptoms are), but I am always curious how truthful that is....36 with cf