Someone told me aspartame can make you retain fat. This was in reference to protein powders which contain it. So I've been doing some reading about aspartame online & of course there are studies showing both that it is safe & not safe. The Nutrasweet site of course says that all studies have shown that it is safe. But there are many other sites which list symptoms from minor to more serious about the effects of this sweetener....from headaches, problems with seeing, hearing, digestion, to tumors, ms, & cancer...etc. They list the 3 ingredients of aspartame & explain the effects on the body...it doesn't sound too healthy. I am possibly experiencing some minor symptoms (or I am just paranoid since it was mentioned to me)....so I am giving up aspartame starting today. This will mean switching from the "light" yogurt I eat (2-3 cups a day) to either another kind which would be more fattening or some other healthy low-fat source of calcium. This will not be a big deal, especially if I notice I am feeling better (not that I am sick, but a person can always feel better !!) What is your experience with aspartame ??? Has anyone had any problems or ill effects ??? Has anyone given it up & noticed any symptoms which went away ?? Thanks for sharing any experiences. And while we're at it... I use 3 packets of Sweet & Lo a day....any comments on experiences with that would also be appreciated.