Nutrition can be defined as: organisms obtaining organic substances and mineral ions from which they obtain energy by respiration and raw materials for growth and repair.

This page is about human nutrition - what substances we need and why we need them.

Types of nutrient[edit | edit source]

Why we need Nutrients[edit | edit source]

  • To give us energy. This is needed for many processes, such as generating heat, kinetic energy in our muscles, and chemical energy. The most important energy producing nutrients are carbohydrates and fats.
  • To provide us with materials to build cells. The most important building materials are proteins.
  • To give us chemicals needed for chemical reactions. The most important nutrients for this are proteins, vitamins, minerals and water.
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