came across this presentation by Dr Leo Galland (he has just released a book about allergies, I listened to a podcast today about that book, late 19th Century no medical journal mentioned allergies, the issue of allergies/asthma only became a prevalent issue from 1960's onwards)
anyways, went to look at his website and articles and found this;
http://mdheal.org/articles/proteinnutri ... /frame.htm
he has some slides on how much protein we should consume, and quotes various studies etc
If you want to listen to the podcast about the allergies - it was a good layperson explanation why allergy issues are on the increase.High meat diets increase zinc bioavailability in elderly women (Hunt et al, Am J Clin Nutr 1995; 62: 621-32) and iron and zinc utilization in young women, with no effect above 3 oz lean beef/d. (Johnson & Walker, J Am Diet Assoc 1992; 92: 1474-8).
High Intensity Health Radio Podcast#136 with Leo Galland, MD - Allergies and Balancing the Immune System
how enviro toxins may be causing plants to produce more allergens
how enviro compounds may be causing your immune system to be increasingly susceptible to allergens