Is proteins good or bad for your body?

Proteins are basic components of all living cells and are therefore among the principal substances that make up the body. In addition to being necessary for the growth and repair of the body's tissues, proteins provide energy and act as enzymes that control chemical reactions in the cell.

Foods that contain a high percentage of protein include meat, fish, poultry, milk products, beans, and nuts.

Source: Answers.com

İ want to give an example to realize importance of proteins.i think everyone knows importance of enzymes. they take part almost all actions. the main part of enzymes are composed of protein. this example is enough to grasp the importance of proteins
it fills you up so your not so hungry

like:

*peanut butter

*eggs

*nuts

*milk

*yogurt (that doesn't have as much though)

*and beetles (no i'm serious lots of protein)