Carbs with sugar IMO. Sugar alcohols can mess with your tummy. A little are find but bars with no sugar and all sugar alcohols usually have a lot of them in it and sometimes cause a laxative effect or pretty bad cramps. But I like protein bars, and I think one a day while cutting is fine, especially if it keeps your from binging. I personally like to have the option of a protein bar while cutting because it makes me feel like I'm eating candy.