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.
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A nutrient supplies material or energy used by an organism. In mathematical biology, a nutrient concentration can be transported, produced and consumed, and can influence population dynamics or act as a chemoattractant.
