The dangers associated with head injuries are increasingly well-reported in the media. However, increased awareness has led some people to seek out concussion remedies and prevention tools that are not validated. In many cases, products claiming to offer "protection" and "faster recovery" are unproven and offer a false sense of security.

Though parents routinely ask for a 'concussion-proof' helmet, there is no way to prevent a brain injury... short of not participating in the sport.

http://www.chicagotribune.com/health/ct-met-concussion-products-health-20110625,0,761365,full.story

SportsConcussion.org features the story of an all-star athlete struggling with post-concussion syndrome.  Symptoms can linger – in this case, for over a year – if concussed students don't get adequate cognitive and physical rest:

Looking back, Neal said, "I shouldn't have fought through the symptoms like I did in the beginning. I should have immediately reduced my classes because I probably did myself more harm than good by trying to power though. I didn't realize what a difference cognitive rest really made."

Successful (again) at Brown: http://www.sportsconcussions.org/feature-stories-Neal-Rooney-post-concussion-syndrome.html