New York City has already done it, and other cities are thinking about them too. Now Boston is the latest city to consider banning the dreaded trans fats.

It's nothing that's going to happen overnight, since they are just beginning to think about it after meeting with New York City health officials about the issue. They could make a decision as soon as this February, but even if they do that the ban would not go into effect until 2008.

Nutritionist Bonnie Minsky carries around a prop with her when she has speaking engagements: a cupcake. You wouldn't think that a dietitian would want to have a treat like this around her, especially since it is the processed, packed-in-plastic type of snack cake, but she uses it to make a point about the dangers of trans fats. You see, the Hostess cupcake that she carries is 25 years old. The plastic packaging didn't hold up too well, nor did the frosting, but the cake itself appears to be relatively undamaged.

The cake was intended to be an experiment from the beginning. She purchased the cake in 1981 and "let it site for a few months" to see what would happen. She also purchased an apple at the same time. Of course, the apple began to decompose in fairly short order, but nothing happened to the cupcake. She attributed the lack of change to the presence of partially hydrogenated oil - a.k.a. trans fats - because "the [other] ingredients in the cupcake are all real."

Minsky thinks that the recent moves in Chicago and New York, as well as other cities and countries around the world, to ban trans fats are a good idea. And after seeing what they can do to a cupcake, even if there is no definitive answer about what they do to your body, it doesn't seem like such a bad idea.

KFC announced yesterday that they intended to begin eliminating trans-fats from their recipes, starting with their famous fried chicken. Over the course of the next 6-8 months, by April of 2007, all KFC stores will switch to using a non-hydrogenated cooking oil, although some locations already use it. If this seems like a minor change, consider that one extra-crispy chicken breast (is there any other kind worth going to KFC for?) has 4.5 grams of trans fat!

The process of testing the recipes has taken the company about two years. Even though the partially hydrogenated oil that they currently use does not really contribute to the product in terms of flavor, it does produce a superior crispness that lasts longer than some other oils. The company did not want to put out a product that would not live up to their consumers' expectations - even if it was healthier. They will be using low linolenic soybean oil. Other fast food companies, including Pizza Hut and Taco Bell, which are also owned by KFC's parent company, Yum Brands Inc., say that they are looking into replacing partially hydrogenated oils on their menus, as well.

KFC fans should take note that there will still be a few things on the menu that will not be trans-fat free, namely their biscuits, macaroni and cheese and baked goods.