Easy Peasy.

I use the atkins bars and a couple other protein bar options.  I need to keep something that looks like a pretend candy bar in my desk so that I don't go to the vending machine at 4pm when my office cafeteria closes.  Don't depend on them for nutrition, but if you need an easy snack, it's better than a candy bar if you can handle the sugar alc.  I don't seem to have any trouble with them.  I don't love the way they taste, but at least I get protein when I have a snack and I can keep them in my desk and don't have to stress about forgetting them at home and having nothing of value when the snack attack strikes.

Atkins original 1972 plan was all whole foods.  I recommend that plan.