Protein bar
| Main ingredients | Various protein foods, sugar | 
|---|
Protein bars are convenience food that contain a high proportion of protein relative to carbohydrates and fats. Despite the label focusing on protein, many mass-marketed protein bars contain more added sugar than some desserts like cookies or doughnuts, making them more like candy bars. The source of protein may be animal, e.g., whey (vegetarian) or collagen, or plant (e.g., pea protein, or peanut).