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Protein combining or protein complementing is a dietary theory for protein nutrition that purports to optimize the biological value of protein intake. According to the theory, individual vegetarian and vegan foods may provide an insufficient amount of some essential amino acids, making protein combining with multiple complementary foods necessary to obtain a meal with "complete protein".
Natural protein concentrates (often used in bodybuilding or as sports dietary supplements): Soy protein isolate (prepared with sodium or potassium): 80.66; Whey protein isolate: 79; Egg white, dried: 81.1; Spirulina alga, dried: 57.45 (more often quoted as 55 to 77) Baker's yeast: 38.33; Hemp husks 30
The foodstuffs listed for comparison show the essential amino acid content per unit of the total protein of the food, 100g of spinach, for example, only contains 2.9g of protein (6% Daily Value), and of that protein 1.36% is tryptophan. [2] [7] (note that the examples have not been corrected for digestibility)
This value is known as the "crude protein" content. The use of correct conversion factors is heavily debated, specifically with the introduction of more plant-derived protein products. [20] However, on food labels the protein is calculated by the nitrogen multiplied by 6.25, because the average nitrogen content of proteins is about 16%.
The previous version had four food groups: vegetables and fruit (7 to 10 servings a day for adults, depending on biological sex), grain products (6 to 8), milk and alternatives (2), and meat and alternatives (2 to 3). [13] Canada developed its first nutrition guide in 1942 as part of its wartime nutrition program. [14]
The Family Nutrition Program (FNP) is a free nutrition education program serving low-income adults around the U.S. This program is funded by the Food Nutrition Service's (FNS) branch of the United States Department of Agriculture (USDA) usually through a local state academic institution that runs the program.
Protein supplements are extracts or concentrates of high protein foodstuffs, used in bodybuilding and as dietary supplements to fulfill protein intake in a lean and pure source of proteins and amino acids. They have three main variants: concentrate (food is taken and concentrated into a smaller volume with some fat and carb present), isolate ...
A high-protein diet is a diet in which 20% or more of the total daily calories come from protein. [1] Many high protein diets are high in saturated fat and restrict intake of carbohydrates. [1] Example foods in a high-protein diet include lean beef, chicken or poultry, pork, salmon and tuna, eggs, and soy. [2]