Health & Nutrition


Nutrition icon - green circle with white apple in the center

A nutrient is a chemical that is essential for life. Nutrients are needed to regulate body functions, build and repair tissues and provide energy.


Macronutrients provide energy (calories). Macronutrients are nutrients that are needed in large quantities.

There are three macronutrients:

  • Protein – builds, maintains and repairs tissues and is found in every cell, tissue and organ in the human body
  • Dietary Fat – required for growth, development, energy, vitamin absorption, cushioning organs and maintaining cell membranes
  • Carbohydrates – used by the body for energy and are needed by the body to function properly


There are two micronutrients:

  • Vitamins – essential for normal growth and development and for healthy maintenance of cells, tissues and organs
  • Minerals – required by the body to support biochemical processes


Water is vital to our survival and is required to burn fat, filter toxins, balance fluid, regulate nerve and muscle function, transport nutrients and excrete waste.

Image Credit: Army Medicine

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