A protein bar is designed to be eaten post-workout, when your body is low on glucose and is in need of a protein hit to aid recovery. In addition, they are meant to be used as a healthy snack alternative when on-the-go, instead of eating conventional chocolate bars or snacks.
A protein bar can be a great way of increasing your daily protein intake, however it's important to beware of the calories and sugar. Sometimes, it's better to get your protein from natural food such as lean meat, poultry, eggs, nuts and seeds, and beans.
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Protein is an essential macronutrient necessary for growth and the maintenance of health. For some people, adding more protein to their diet may be of benefit to help avoid age related muscle loss, to maintain a healthy state, or to build muscle when training. The premise of a protein bar is to provide a convenient food, highly enriched in protein, to supplement your normal diet. That seems simple enough.