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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".
Different protein sources that are each incomplete on their own, typically are complete when combined. [6] The following table lists the optimal profile of the nine essential amino acids in the human diet, which comprises complete protein, as recommended by the US Institute of Medicine's Food and Nutrition Board.
A complete protein source contains all the essential amino acids; an incomplete protein source lacks one or more of the essential amino acids. It is possible with protein combinations of two incomplete protein sources (e.g., rice and beans) to make a complete protein source, and characteristic combinations are the basis of distinct cultural ...
An incomplete protein, on the other hand, lacks one or more of these essential amino acids. ... While incomplete proteins don't individually contain all nine essential amino acids, they each offer ...
Here are a few complete protein combinations that aren’t beans and rice, plus the benefits of getting all the essential amino acids. If You’re Following a Plant-Based Diet, Here’s What You ...
As a fuel, proteins provide as much energy density as carbohydrates: 17 kJ (4 kcal) per gram; in contrast, lipids provide 37 kJ (9 kcal) per gram. The most important aspect and defining characteristic of protein from a nutritional standpoint is its amino acid composition. [2] Proteins are polymer chains made of amino acids linked together by ...
Soy, quinoa, and hemp seeds are among the few plant-based complete proteins, which can help vegans and vegetarians round out their protein intake. The 2020–2025 Dietary Guidelines for Americans ...
The words protein, polypeptide, and peptide are a little ambiguous and can overlap in meaning. Protein is generally used to refer to the complete biological molecule in a stable conformation, whereas peptide is generally reserved for a short amino acid oligomers often lacking a stable 3D structure. But the boundary between the two is not well ...