“So-called cognitive-enhancing drugs are usually prescribed to treat medical conditions, but they are also known for their ability to improve memory or focus. Many people buy them over the internet, which is risky because they don’t know what they are getting. We also know next to nothing about their long-term effects on the brains of healthy people, particularly the young. But some scientists believe they could have a beneficial role to play in society, if properly regulated.

So who’s taking what?” (via New Scientist).