…same as the old villain: MSG, only now it’s making you fat. Now me, I’ve been waiting for a new “making me fat” chemical bad guy ever since trans fats became a de-facto controlled substance two years ago. When giant people didn’t suddenly pop back into size 4’s and 32-inch pants, I argued, a new bad molecule would have to be found. MSG already has a questionable reputation. It may be the perfect fall guy…at least until a better one comes along.