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Nutrition is the biochemical and physiological process by which an organism uses food to support its life. It provides organisms with nutrients, which can be metabolized to create energy and chemical structures. Failure to obtain the required amount of nutrients causes malnutrition.
Human nutrition deals with the provision of essential nutrients in food that are necessary to support human life and good health. [1] Poor nutrition is a chronic problem often linked to poverty, food security, or a poor understanding of nutritional requirements. [2]
Because the body does not manufacture certain fatty acids (termed essential fatty acids), they must be obtained through one's diet. Ethanol is not an essential nutrient, but it does provide calories. The United States Department of Agriculture uses a figure of 6.93 kilocalories (29.0 kJ) per gram of alcohol (5.47 kcal or 22.9 kJ per ml ) for ...
Even though macros and calories are different concepts, they are dependent on each other. While macros refer to the three types of main nutrients that you need - protein, carbohydrate, and fat, calories, on the other hand, refer to the nutritional value of your meal. [3]
Water and fiber have low energy densities, or calories, while fat is the most energy-dense component. [3] Some inorganic (non-food) elements are also essential for plant and animal functioning. [7] Human food can be classified in various ways, either by related content or by how it is processed. [8] The number and composition of food groups can
The human diet can vary widely. In nutrition, diet is the sum of food consumed by a person or other organism. [1] The word diet often implies the use of specific intake of nutrition for health or weight-management reasons (with the two often being related).
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The requirements for a healthy diet can be met from a variety of plant-based and animal-based foods, although additional sources of vitamin B12 are needed for those following a vegan diet. [4] Various nutrition guides are published by medical and governmental institutions to educate individuals on what they should be eating to be healthy.