Perhaps one looks at the past through rose tinted glasses, and I don’t have the data to prove it, only my memory, but I’m sure that when I was a kid in school in the 1960’s there was only one or two kids in my class of 37 (yes 37!) that had Asthma.
Studies have shown that asthma rates in North America have doubled in the last twenty years or so.
Now it seems like every other kid has an inhaler (and many many adults too).
It seems that allergies of all kinds are very much on the increase.
Some blame this on the fact that we increasing live in almost hermetically sealed homes, at a constant temperature, heated in the winter, air-conditioned in the summer, which give dust mites the perfect breeding ground, along with the tendency to wall-to-wall carpeting.
However, eating more fruit and vegetables, and a Mediterranean style diet in general seems to lead to lower rates of asthma and other allergies.
Try eating at least a half dozen servings of fresh fruit and vegetables each day. Also oily fish, such as salmon, mackerel, and sardines, trout and herring twice a week.
Try to reduce the amount of omega-6 fats, found in corn and soy, as well as margarines and processed foods, as there seems to be some evidence that omega-6 can cause inflammation, which can worsen or promote asthma.