These Silicon Valley 'biohackers' are fasting their way to longer, better lives

Breakfast on Wednesday morning is engineer Paul Benigeri's favorite meal of the week. Why? "I haven't eaten in 60 hours," Benigeri tells Business Insider in a sunlit café in San Francisco, after clearing through a frittata with no spinach and extra goat cheese.

Benigeri and his coworkers at Nootrobox, a subscription service for "smart drugs," or cognition-enhancing supplements, are part of a Bay Area group of biohacking enthusiasts called WeFast. The club believes that intermittent fasting promotes longevity, increases focus and productivity, and leads to a healthier diet.

I recently attended the group's weekly breakfast to find out the appeal of starving yourself.