You're browsing the grocery store, trying to decide what to make for dinner tonight, when you spot them: frozen meals. The siren song of these neatly packaged, single-serving, easy-to-make little dinners is almost too much to resist! Plus, the box says low-calorie and non-fat, right? While they may be alright for the occasional lazy night when doing anything other than popping a box in the microwave seems like an impossible exertion, you should stay away from frozen dinners as much as you can, says fitness and nutrition expert Kimberly Snyder.

"[B]ehind the glitzy, easy temptation that packaged foods present as being 'healthy' and 'low calorie' the truth remains: Packaged foods are processed foods," Snyder explains to TotalBeauty.com. "And processed foods never, ever behave the same in the body as fresh, whole foods do."

Frozen dinners are full of additives and chemicals that can change the way your body digests the meal. Instead of something from the freezer, you should try making an equally effortless dinner made of fresh ingredients from the produce aisle and the meat counter. You can sautee a salmon fillet in just a few minutes, top it with a little lemon juice and munch on a side salad - all in the time it would take to microwave a frozen meal.