When people choose to use powerful, and potentially dangerous, stimulant medications to enhance cognitive functioning they need to manage the risks.

FORBES: When 'Study Drugs' Kill (Part 2): Reducing The Risks From Brain-Doping

Many go to the medicine cabinet in search of an edge, wanting something to enhance cognitive functioning.

FORBES: When 'Study Drugs' Kill (Part 1): How Ambition Becomes Adderall Addiction

Moreover, the Durham University study also found a link between the duration of breastfeeding and the growth of the brain after birth, causing researcher Barton to suggest two years of breastfeeding may lead to increased cognitive functioning.

FORBES: How To Make Your Baby Smarter