I don't know, there seemed to be a variety of opinion on there, based on what the manufacturer claimed they were using in the specific filter.
For what it's worth my wife claims her hair is in better shape following the installation of our shower head filter - we have pretty heavily chlorinated water; if I let stand a glass of water on the counter for awhile that bleachy odour will soon develop.
I don't know, there seemed to be a variety of opinion on there, based on what the manufacturer claimed they were using in the specific filter.
For what it's worth my wife claims her hair is in better shape following the installation of our shower head filter - we have pretty heavily chlorinated water; if I let stand a glass of water on the counter for awhile that bleachy odour will soon develop.