The last problem food to be wary of is the protein bar, despite its prevalence in many diet programs and meal plans. These may seem like a great option because they contain protein, but once again you have to look a little closer.
Check that sugar content. Most protein bars have upwards of 15 grams of sugar per bar. Some contain 30 and even 40 grams.
In actuality, these are glorified chocolate bars. While you can buy a few bars with very low sugar content (five grams or less per bar), these will require a little searching.