The China Study seems to be referenced just about everyday lately by a fitness or nutrition professional. Usually these people are telling you to avoid animal products all together, that being vegetarian is the healthiest way to eat to avoid degenerative diseases and that animal protein will straight up kill you.
First off, let me explain The China Study to those who have not read it, and for full disclosure neither have I, though it is on my short list. According to wikipedia:
The China Study is a 2005 book by T. Colin Campbell, Ph.D., and his son, Thomas M. Campbell II. Dr. Campbell is a professor of Nutritional Biochemistry at Cornell University and one of the directors of the China Project.
The book examines the relationship between the consumption of animal products and illnesses such as cancers of the breast, prostate, and large bowel, diabetes, coronary heart disease, obesity, autoimmune disease, osteoporosis, degenerative brain disease, and macular degeneration. “The China Study,” referred to in the title is the China Project, a “survey of death rates for twelve different kinds of cancer for more than 2,400 counties and 880 million (96%) of their citizens” conducted jointly by Cornell University, Oxford University, and the Chinese Academy of Preventive Medicine over the course of twenty years.
The authors introduce and explain the conclusions of scientific studies, which have correlated animal-based diets with disease. The authors conclude that diets high in animal protein (including casein in cow’s milk) are strongly linked to diseases such as heart disease, cancer, and Type 2 diabetes.
The authors recommend that people eat a whole food, plant-based diet and avoid consuming beef, poultry, and milk as a means to minimize and/or reverse the development of chronic disease. The authors also recommend that people take in adequate amounts of sunshine in order to maintain sufficient levels of Vitamin D and consider taking dietary supplements of vitamin B12. The authors criticize “low carb” diets (such as the Atkins diet), which include restrictions on the percentage of calories derived from complex carbohydrates.