Personally, I think my dandruff is caused by a history of eczema, shitty New York tap water, and chronic bad juju. After my traumatic episode, I searched the racks of Duane Reade for any type of drugstore-brand scalp treatment, when I came across a familiar face: tea tree oil.
From Midtown or the Village, take the F or D trains that run down Sixth Avenue from Central Park to Washington Square or the N or Q trains that run down Broadway to Canal Street. All four of these trains will take you directly to Coney Island in Brooklyn.
Amtrak's Northeast Regional service includes trains running from Washington, Baltimore, and Philadelphia via New York City's Pennsylvania Station ( Penn Station  for short) to Stamford, New Haven, New London and Hartford CT, Springfield MA, Providence RI, and Boston MA.