Why is Silicon Valley obsessed with biohacking?

Geoff Woo talks with Kara Swisher and Lauren Goode about how his company, HVMN — formerly known as Nootrobox — is marketing “human enhancement” products to make customers smarter, more alert or more efficient. Woo argues that medicine focuses only on making sick people normal, and that there’s an untapped opportunity to make normal people better and more productive. He also talks about why he advocates fasting three days a week, and why Silicon Valley is obsessed with the idea of extending life, quantifying health and even ending death.