Head and Shoulders above itself

Since we were little, there have been a few notions so well engrained in our psyche, which are as follows:
-winter is when snow comes
-Polka-roo is never seen by two people simultaneously
-Mr.Clean never grows hair or changes his trademark white shirt
-Head and Shoulders eliminates dandruff

Everyone knows that if you've got snow on your shoulders when it ain't winter, wash with H&S and you'll be snow free in no time. So explain to me this:


Introducing Head and Shoulders Intensive Solution, clinically tested and proven dandruff control. Uhh....isn't H&S regular supposed to achieve the same goal? And what's with the new tag line "Clinically tested and proven dandruff control." So what's with the regular stuff? Is it not tested? Were random chemicals added in the hopes that it would eliminate dandruff? Have we been lied to all of these years, that H&S regular actually doesn't eliminate dandruff??? Are we a victim of media hype???

I want answers damn it, my world is falling to pieces, slowly and gently descending into a personal hell like snow.