Asthma
"I am 44 and developed an allergy to an unavoidable food. It took a long time to work out what it was that was almost killing me.  Constantly on prednisone and other heavy duty meds. Once we worked out the problem we reduced my intake of it as much as possible and started on Montelucast and Nuelin. I have my life back. Some side effects but they mostly pass and since I know what is causing them I am able to rationalise and manage it. The alternative for me was far worse. I would have died."