If it weren't for the fact that she listed zinc, magnesium, selenium, copper, manganese, et al, as poisonous, when magnesium is needed for more than 300 biochemical reactions in the body and by depriving the body of it would be suicidal, I would give more credence to her assertion. But, the amounts that she credits with studies do not have any footnotes and they are considerably high.
Homeopathy is based on the premise that diseases are best treated by stimulating the body's natural defenses with toxins that cause similar symptoms; but, in extremely minute quantities. So, it may be possible that in small doses, radiation may be beneficial.
I wonder if any studies have been done on people who are frequent fliers, because a trip from NY to San Francisco will expose a person to the same amount of radiation you would receive when given a chest x-ray.