This fascinating book describes the different kinds of proteins and how they are used in the body. It also describes how to include these nutrients in a balanced diet. This book also features an "A Closer Look" special feature, informative "Did You Know?" sidebars, a table of contents, a reading comprehension quiz, a glossary, additional resources, and an index. This Focus Readers series is at the Beacon level, aligned to reading levels of grades 2-3 and interest levels of grades 3-5