Proteins (Amino Acids)
Amino acids are the building blocks of the human body. They are used as energy for cellular splitting and reconstruction. Amino acids are essential for repairing the body when it is injured and for the growth of tissue such as muscle. If you eat to much protein, like in the Atkins diet when you eat all the meat, it can be tough on your liver, but this is not something to worry about if you eat an average diet. Be sure to consume some protein in your diet.
Main Sources: meats (white meats such as fish
and chicken), eggs (egg beaters), milk (skim), beans