I don't think they make you sick anymore, but I could be wrong. They used to [or still do, but to be honest I thought they were no longer on the market] make them with something called Olestra which is a low fat soybean oil substitute that causes stomach pproblems for a lot of people. The really offending brand wasn't wow but a whole new chips brand called "Olean" and I'm almost positive that was banned from the market years ago. I've never tried them myself, I don't usually eat these low fat things.