CommonHealth: The World Of DIY 'Brain Hacking'

Electrical brain stimulation is said to help with all sorts of things — from anxiety to improved memory and better focus. Some people are so convinced of its benefits that they're doing it themselves in a practice known as "brain hacking."

Neuroscientists, though, say that the practice may be risky. Not because of what we know, but what we don't know.

Carey Goldberg, editor of WBUR's CommonHealth blog. She tweets @commonhealth.