The document provides an overview of gluten and celiac disease, explaining what gluten is, how it affects those with celiac disease, where it is commonly found hidden in foods, and tips for maintaining a gluten-free lifestyle. It emphasizes that people with celiac disease must be vigilant in always reading food labels due to the potential for ingredients to change without warning. Maintaining a gluten-free diet requires lifelong avoidance of gluten and cross-contamination from foods containing gluten.