|
|
|
Glossary AB CD EF GH IJ KL MN OP QR ST UV WX YZ Protein The class of nutrients or molecules that are composed of chains of amino acids. These molecules form muscle tissue, collagen, enzymes, some hormones such as insulin, and countless other molecules that are needed to sustain life. When protein is used as an energy source, it delivers approximately 4 Calories per gram. |