Is there any evidence that head and shoulders causes hair loss? Also alternatives?

I have been told by a friend of mine that head and shoulders causes hair loss. Is this true? Is there anything bad about using a dandruff shampoo every day?





I am currently using the Wal-Mart knockoff brand (equate) of the shampoo (active ingredient pyrithione zinc, which I believe is the same has head and shoulders), would it change anything?





Also, what are some quality alternatives to head and shoulders (just regular shampoo, not dandruff)?





Thanks for your help.Is there any evidence that head and shoulders causes hair loss? Also alternatives?
Sorry if I spelled this wrong, Seltson Blue is supposed to better.