The document provides an overview of nutrition including what nutrition is, why it is studied, the six classes of nutrients, and typical American diets. It discusses that nutrition is essential for health, growth, and maintenance. The six classes of nutrients are carbohydrates, lipids, proteins, vitamins, minerals, and water which all provide calories, are used for growth, or regulate bodily processes. Typical American diets tend to be high in calories, fat, sugar and protein from animal sources which can increase risk of chronic diseases. Maintaining a balanced diet with fruits and vegetables can help promote optimal health.
23. Transformation of Energy Carbohydrate Protein Fat Alcohol 4 kcal/gm 4 kcal/gm 9 kcal/gm 7 kcal/gm ENERGY SOURCES Build new compounds Muscular movement Nerve transmission Ion balance
