protein in 100% orange juice?


The label says 100% orange juice - no other ingredients. But it has protein. What is the source of the protein? I searched and searched, but found only a 1920's medical paper, and if I understood it correctly, it stated they could not find any protein in orange juice.

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gardengal48 (PNW Z8/9)

Proteins are present in all plants :-) It is part of their chemical make-up. So all fruits and veggies will contain protein as well. Oranges are considered a high protein fruit....they contain approx. 1 gram of protein. Juice is approx. 1.75 grams per cup.

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How embarassing... I need to find myself a high school science textbook! I knew grains had protein, but I really didn't think fruits and vegetables had any. Thanks!

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