Salt is the only rock people eat. The human body needs it to survive. But it does not need much. This title uncovers the nutritional benefits of salt, how it interacts with the body, and how to include it as part of a balanced diet. Easy-to-read text, vivid images, and helpful back matter give readers a clear look at this subject. Features include a table of contents, infographics, a glossary, additional resources, and an index. Aligned to Common Core Standards and correlated to state standards. Core Library is an imprint of Abdo Publishing, a division of ABDO.