Yes! This was the original reason for starting to eat Paleo. I have had asthma since childhood and didn't like the idea of being on steroid inhalers for life.
I began in November and found within a few weeks that things had improved. About 10 weeks ago the improvement was such that I cut from inhalers twice a day to morning only, then to every other day, and eight weeks ago I stopped them entirely.
I can now walk miles - even up hills - and while I take a Ventolin with me still (just in case!!) it is really as though I don't have asthma any longer. And I have sailed through the pollen season with no problems - spring used to bring on attacks and this year, not!!
Downside - the steroid inhaler must have been suppressing the psoraiasis I used to suffer from, as it came back when I stopped taking the steroids. But - not too badly, and it is not nearly as bad as having debilitating asthma!!!!
Tell her to go for it! BUT - I also make a point of reducing inflammatory Omega 6 andvery much increasing Omega 3 - I think this has been a very important part of the improvement.