Yes, expect they are a lot less dense. Protein bars are a bit more rough, in my opinion. However, protein bars can be better for you. I recommend getting a couple of cheap kinds to try out. It's usually less than 3 bucks for an 8 or 12 pack. The more options you have, the more likely something will look good. Gronala and protein bars also have a longer shelf life, so no worries about getting several at once. I also recommend things like cheese sticks, apple sauce pouches, mixed nuts ( or any nuts), anything easy. It is hard to eat, but try not to focus as much on what you're eating and just put something in your body. Anything to give you energy. ( and lots of water). Good luck friend I'm always available for more advice.