Originally Posted by
SanDiego1K
I was completely oblivious to sodium even being in shampoo, let alone it causing a problem.
Ditto.
And I've got to imagine the folk who make shampoo & conditioner especially for color-treated hair would be aware of any substance that would cause the opposite effect of what they're hoping to achieve and not include it - unless of course they're trying to sell more of the stuff
Cheers.