Campbell does not advocate strict prohibition of animal protein. He observes, merely, that it’s probably easier to avoid it altogether than to reduce the intake

Campbell does not advocate strict prohibition of animal protein. He observes, merely, that it’s probably easier to avoid it altogether than to reduce the intake to safe levels. The argument is as follows, albeit simplified: When you eat an animal-based diet you are likely to eat a lot more protein than you should, say 20-40% of calories. Recommenced is 10% which is nowadays very close to what authorities generally recommend regardless of source. Campbell argues that it is very challenging to achieve that 10% on a traditional western animal based diet, therefore suggests avoiding animal based protein. He does not say that an occasional meal with meat is harmful. A varied Whole Foods plant based diet just happens to average out at around 10% protein of calories.