My food allergies dictate what I eat. And that means no grains, no corn, no cane products, no rice even. These have evolved over time. Shoots the heck out of my complementarity, eh? Some seeds I can eat but they are often marginal. Some beans are ok. So I eat meat of one sort or another and veggies. Whenever I try to diverge from my 'diet' I pay the price of rhinitis, congestion, swollen eustachian tubes. No fun. I'd make a lousy veggie'ist. Other breathing issues have recently arisen in the form of adult onset asthma. For me, clear breathing is much more important than diet. Frankly, as the population increases unabated we are all doomed to suffer, it is only a matter of time...