Owners of cars do not question the need for their proper assembly, maintenance and fuel. They know that, as complex machines, cars need to be given the appropriate type of gasoline (or other fuel), oil, and other fluids. They would not attempt to argue that a car could run without these things.

Our bodies are much, much more complex machines than are our cars, and they too have basic needs for the types of fuel that help them to develop, operate properly, and maintain themselves. Proper nutrition is essential for humans at all stages of our lives to keep our bodies in optimal shape and to provide us with healthy, long and happy lives. In this article I will describe some of the major reasons that nutrition is so important for everyone throughout the life cycle.
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