We define a "sugar" as either of:because these are small carbohydrates, and they taste sweet to humans.
The most important on in metabolism internals, everything else gets converted to it before being processed in the .
en.wikipedia.org/w/index.php?title=Nutrient&oldid=1075972831#Essential gives somewhat of an overview:
Mentioned at 100 Greatest Discoveries by the Discovery Channel (2004-2005) medicine episode.
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A nutrient is a substance that provides the essential elements necessary for the growth, development, and maintenance of an organism. Nutrients can be classified into several categories, primarily: 1. **Macronutrients**: These are needed in larger quantities and provide the energy necessary for various bodily functions. They include: - **Carbohydrates**: The body's primary energy source. - **Proteins**: Essential for building and repairing tissues.