I have not heard of the word ' brittle ' but I am a long term asthmatic and was always in hospital as I was growing up. At about 27 I got fed up with conventional medicine and sought alternatives. These being = good diet, no milk... then I got acupunture and did a course called BUYTEKO, which is a simple breathing programme. I live in NEW ZEALAND , so I am sure they must have this in London! GOOD LUCK!