Nutrition is a science that studies the relationship between diet and health. There is a large spectrum ranging from malnutrition to optimal health, which includeds many common symptoms and diseases which can often be prevented or alleviated with better nutrition.

The human body is made up of chemical compounds such as water, amino acids (proteins), fatty acids (lipids), nucleic acids (DNA/RNA), and carbohydrates (e.g. sugars and fiber).

There are six main classes of nutrients that the body needs: carbohydrates, proteins, fats, vitamins, minerals, and water. It is important to consume these six nutrients on a daily basis to build and maintain healthy bodily function.