What essential characteristic defines the protein profile of soybeans compared to many other plant sources?

Answer

Complete protein profile, containing all nine essential amino acids

Soybeans are distinguished by having a complete protein profile. This means they supply adequate amounts of all nine essential amino acids that the human body is unable to synthesize internally and must obtain through diet. This nutritional characteristic places the protein quality of soy in a comparable category to that derived from animal sources such as meat, eggs, and dairy products. This feature is especially significant in supporting vegetarian and vegan diets where sourcing all necessary essential amino acids can sometimes be challenging with other single-source plant foods.

What essential characteristic defines the protein profile of soybeans compared to many other plant sources?
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