means faster growth rates, including faster cancer growth, earlier menarche, and more breast cancer.
It is not possible to consume a mostly animal protein diet and consume only 10% protein. Most meat contains about 50% protein. The meat would have to be mostly fat to not contain so much protein and eating mostly fat isn't something you want to do either. It is difficult to keep eating meat with a mostly plant-based diet because a plant-based diet will give you all the protein you need and any meat consumed would be giving you excess protein that would be harmful to your body. There is no need to combine protein or even eat certain plant proteins together. Supplementing with animal-based proteins would displace complex carbohydrates and antioxidants and add unnecessary protein and fat.
Consuming more than 10% protein of your total calories has been shown in numerous studies to actually harm the body. One study with rats injected with carcinogens showed that tumor growth could be turned on and off with the amount of protein being given to the rats. When 20% of total calories were protein, tumors grew, but when given 5% protein, tumors stopped growing and would actually reduce in size. After 100 weeks, all of the rats given 20% protein were dead, while all the rats given 5% protein were alive. Interestingly enough, when tested in research studies, plant protein, even when consuming over 20% of total calories, does not promote cancer development. It is only animal protein that seems to induce cancer development when more than 10% of total calories is consumed.
The point is that we need to stop worrying about how much protein we are getting, and start focusing on where we are getting our protein from. Plant protein is proving to be a better source of protein than animal protein. The key to getting enough protein is to simply eat a variety of plant-based foods. As long as you are doing that, you will always be getting enough protein. After all, a powerful silverback gorilla eats only plants, and no one worries about if he is getting enough protein!
Source:
The China Study by T. Colin Campbell, PhD and Thomas M. Campbell II, MD