The definition of protein complementation is

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Protein complementation refers to combining two or more incomplete protein sources, typically plant-based, together in order to form a complete protein profile. This is necessary because many plant-based proteins do not contain all the essential amino acids needed to build and maintain muscle tissue and other bodily functions. By combining different plant-based proteins, such as beans and rice or hummus and pita bread, individuals can ensure that they are consuming a complete protein profile that contains all the essential amino acids. Option A is incorrect because complete proteins do not necessarily become more effective in the presence of each other. Option C is incorrect because not all mixtures of incomplete proteins will result in a complete protein profile. Option D is incorrect because not all sets of amino acids will combine to form a complete protein, and protein complementation refers specifically to combining different protein sources. Protein complementation refers to combining two or more protein sources that together provide all essential amino acids in adequate amounts. Incomplete protein foods are those that are lacking in one or more essential amino acids, so combining these incomplete proteins allows for a complete protein profile.

The Definition of Protein Complementation Is