This document discusses key aspects of healthy living and nutrition. It introduces food groups and explains the Recommended Dietary Intake (RDI), which is the daily intake level considered sufficient to meet nutritional requirements for most people. It also discusses vital nutrients, kilojoules and calories, vitamins, and minerals. For vitamins and minerals, it provides brief definitions, noting that vitamins are classified by biological activity rather than structure and minerals are naturally occurring solid substances with chemical formulas.