Efficiency of what? You need X protein. They provide far more than X. There is absolutely no problem with their protein source. The fact that they could use

Efficiency of what? You need X protein. They provide far more than X. There is absolutely no problem with their protein source. The fact that they could use slightly less raw ingredient to get there doesn't matter if that other ingredient is hard to source consistently. We've had proof of grains being milled 100,000 years ago for several years now. The 10,000 myth that is used to promote fad diets is not accurate. Dietitians require barely any training. Just a degree in whatever and a brief "read this book and learn how to repeat what it says". You can do it in two weeks. They are absolutely less qualified than doctors. Doctors refer you to them because doctors have limited time and teaching people the food pyramid is not a valuable use of it.