Actually the bioavailability ie the amount of protein that your body absorbs from whey is greater than any other source (whey is often found in the liquid portion of the cottage cheese... unles you strain the cheese once you buy it.) As for the Amino Acid score ie the diversity of protein found in cottage cheese/whey it is low compared to fish or beef. And frankly you are incorrect about dairy products being bad for adults.Moreover the sodium found in regular soy sauce vastly negates its value in protein...( however soy milk on the other hand is a both non dairy low salt source of protein.)