Hi Molly C,
For your information, Plombières-les-Bains in Lorraine region has some low doses of RADON. I did a three week cure and it did help. The problem was that it lasted only a couple of month. It's for this reason that I decided to tried Jackmov this year. The RADON is about 50X stronger in Jackymov than in Plombières-les-Bains.