Vitamin - Chemical needed in small amounts for healthy metabolism. Some organisms can make them, some organisms have to obtain them in the diet., Mineral - An inorganic element, essential for normal bodily functions, Protein - Polymer of amino acids needed for growth and repair, Carbohydrate - Biological molecule with general formula Cx(H2O)y used as an energy source, Water - Essential for body function. Used to transport substances around the body. 60% of the human body is made up of this, Fat - Essential as a source of energy and important in cell membranes, Fibre - Indigestible part of food. essential for healthy functioning of the digestive system,

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