Doesn’t that mostly come down to where you live and what enforcement looks like there?

Recently moved to an area with hard water. Wife and I were noticing more hair loss while showering. Turns out an ingredient “EDTA” can help remove buildup from hard water that damages hair. This is a common ingredient in expensive shampoos but it’s also in Head and Shoulders. Wife started using expensive shampoos to help and I switched to Head and Shoulders. She just ended up using my shampoo(much cheaper) and it’s been working well for us. Hope this helps others.