Myasthenia Gravis Support Group
Myasthenia gravis (MG) is a neuromuscular disease leading to fluctuating muscle weakness and fatiguability. The hallmark of myasthenia gravis is muscle weakness that increases during periods of activity and improves after periods of rest. Although myasthenia gravis may affect any voluntary muscle, muscles that control eye and eyelid movement, facial expression, and...
Cryolite:
http://www.epa.gov/oppsrrd1/REDs/factsheets/0087fact.pdf
Sulfuryl fluoride breaks down to fluoride after it is applied
"The U.S. Environmental Protection Agency has re-evaluated the current science on fluoride and is taking steps to begin a phased-down withdrawal of the pesticide sulfuryl fluoride, a pesticide that breaks down into fluoride and is commonly used in food storage and processing facilities. Sulfuryl fluoride is currently registered for the control of insect pests in stored grains, dried fruits, tree nuts, coffee and cocoa beans, and for use in food handling and processing facilities"
http://www.epa.gov/pesticides/sulfuryl-fluoride/evaluations.html
In addition:
"The controversy occurs mainly in English-speaking countries, as Continental Europe does not practice water fluoridation. Those opposed argue that water fluoridation imposes ethical issues, may cause serious health problems, is not effective enough to justify the costs, and has a dosage that cannot be precisely controlled."
On Health problems(harm to teeth, body etc):
http://www.fluoride-journal.com/98-31-2/312103.htm
I avoid it as much as possible...in other words, I believe it is not good for people with MG, or any other person without.
My two cents
Hope that helps,
TJ