完全吃素不如平衡饮食.
Campbell reiterates the myth that dietary fat and cholesterol contribute to Alzheimer's and discusses the potential protective effects of plant foods,45 but makes no mention of the protective effect of DHA, an animal-based nutrient, that is currently being investigated and has been known about for years.46
The China Study frequently ignores the contribution of animal foods to certain classes of nutrients, such as B vitamins and carotenes. Both classes of nutrients are assumed to come from plant foods, despite egg yolks and milk from pastured animals being a good source of carotenes, and the high B vitamin content of liver.
The most curious of such statements is one found on page 220, where Campbell declares, "Folic acid is a compound derived exclusively from plant-based foods such as green and leafy vegetables."47 (My italics.) This is a fascinating statement, considering that chicken liver contains 5.76 mcg/g of folate, compared to 1.46 mcg/g for spinach!48 A cursory look through the USDA database reveals that the most folate-dense foods are organ meats.
The China Study contains many excellent points in its criticism of the health care system, the overemphasis on reductionism in nutritional research, the influence of industry on research, and the necessity of obtaining nutrients from foods. But its bias against animal products and in favor of veganism permeates every chapter and every page.
Less than a page of comments are spent in total discussing the harms of refined carbohydrate products. Campbell exercises caution when generalizing from casein to plant proteins, but freely generalizes from casein to animal protein. He entirely ignores the role of wheat gluten, a plant product, in autoimmune diseases, so he can emphasize the role of milk protein, an animal product. The book, while not entirely without value, is not about the China Study, nor is it a comprehensive look at the current state of health research. It would be more aptly titled, A Comprehensive Case for the Vegan Diet, and the reader should be cautioned that the evidence is selected, presented, and interpreted with the goal of making that case in mind.
Campbell reiterates the myth that dietary fat and cholesterol contribute to Alzheimer's and discusses the potential protective effects of plant foods,45 but makes no mention of the protective effect of DHA, an animal-based nutrient, that is currently being investigated and has been known about for years.46
The China Study frequently ignores the contribution of animal foods to certain classes of nutrients, such as B vitamins and carotenes. Both classes of nutrients are assumed to come from plant foods, despite egg yolks and milk from pastured animals being a good source of carotenes, and the high B vitamin content of liver.
The most curious of such statements is one found on page 220, where Campbell declares, "Folic acid is a compound derived exclusively from plant-based foods such as green and leafy vegetables."47 (My italics.) This is a fascinating statement, considering that chicken liver contains 5.76 mcg/g of folate, compared to 1.46 mcg/g for spinach!48 A cursory look through the USDA database reveals that the most folate-dense foods are organ meats.
The China Study contains many excellent points in its criticism of the health care system, the overemphasis on reductionism in nutritional research, the influence of industry on research, and the necessity of obtaining nutrients from foods. But its bias against animal products and in favor of veganism permeates every chapter and every page.
Less than a page of comments are spent in total discussing the harms of refined carbohydrate products. Campbell exercises caution when generalizing from casein to plant proteins, but freely generalizes from casein to animal protein. He entirely ignores the role of wheat gluten, a plant product, in autoimmune diseases, so he can emphasize the role of milk protein, an animal product. The book, while not entirely without value, is not about the China Study, nor is it a comprehensive look at the current state of health research. It would be more aptly titled, A Comprehensive Case for the Vegan Diet, and the reader should be cautioned that the evidence is selected, presented, and interpreted with the goal of making that case in mind.
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