Protein is the basic substance that constitutes human cells.
Sugar is the most important energy-supplying substance for human body.
Fat is a spare energy substance in the human body.
Vitamins are neither the main raw materials to constitute tissues nor the substances to supply energy, but they play an important role in various life activities of the human body.
Inorganic salts are important raw materials for human tissues.
Water is the main component of cells, and nutrients and wastes must be dissolved in water before they can be transported.
Dietary fiber is the seventh nutrient. Dietary fiber is a kind of indigestible food nutrient. It mainly comes from plant cell walls and contains cellulose, hemicellulose, resin, pectin and lignin. Fiber can slow down digestion and excrete cholesterol as quickly as possible, so it can control blood sugar and cholesterol at the best level. ?
Extended data:
Sugar, fat and protein can be transformed into each other under certain conditions.
Sugar (especially blood sugar) can be converted into amino acids by group conversion, into protein by synthesis, and blood sugar can also be converted into lipids. Lipids can be decomposed and converted into sugars. Protein decomposes to form amino acids, and after deamination, sugars and lipids can be formed.
To sum up, sugar and lipid, sugar and protein can be transformed into each other, but lipid and protein can only be transformed in one direction, only from protein to lipid.
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