Fo real tho, anyone struggling with acne or dandruff should hit up Leona Lewis for advice (the gaffer not the popstar). S/he is giving phenomenal advice in this thread: http://www.neogaf.com/forum/showthread.php?p=135529942#post135529942
He, I believe. (It is funny when people think it's the real Leona Lewis.) (Not that you did!)
(I'm really humbled that Leona has been willing to dole out such amazing advice in that thread.)