Originally Posted by riskaverse
I believe that standard fiberglass insulation is very likely to cause lung disease. Asbestos was well known in the scientific community to be dangerous long before it was pulled off the market. Fiberfax (high temp fiberglass) was known to be dangerous back in the 70's and fiberglass was suspect as well. My conspiracy theory is that the use of fiberglass is too widespread to allow the problems to surface.
It probably doesn't do you any good but the risk is much less than asbestos for the following reason.
There is a particular problem with particles in the 0.1-1 micron particle diameter (The critical dimension is the diameter for fibers because short fibers align with the flud flow streamlines).
Particles larger than 1 micron tend to get caught in the respiratory track and never make it into the lungs.
The lungs actually have a mechanism for removing particles less than 0.1 micron and can therefore protect themselves.
But there is no natural defense for particles of 0.1-1 micron. They get into the lungs and stay there.
The diameter of asbestos fibers put them right in the problem area but if I recall the glass fibers in fiber glass tend to be 10 microns or greater.
Also crystalline materials are worse than amorphous materials.
But even given the above I wouldn't handle fiber glass insulation with out some kind of protection.