The document discusses several key nutrition tools: food groups, dietary standards, and food exchange lists. It provides details on each of these tools. Food groups organize foods into body-building foods, energy foods, and regulating foods. Dietary standards include recommended dietary allowances (RDAs) which establish minimum daily nutrient requirements. Food exchange lists allow for substitutions of similar foods within food categories like fruits or starches. The document also discusses nutrient density and food labeling requirements.