tDCS "Massively Hyped"

A review of the current literature finds little evidence of effect.  It is possible that tweaking of various parameters may help down the line, but

"The danger is that people have been promised better memories, better reading, better maths, increased intelligence… you name it. The effects are small, short lasting, and no substantial claims have been replicated across laboratories. This paper is hopefully the beginning of a counterweight to all the bullshit."