The biohackers who fast and only drink water for up to 7 days to keep focused

Sign up to IndyEat's free newsletter for weekly recipes, foodie features and cookbook releases Get our food and drink newsletter for free Get our food and drink newsletter for free SIGN UP I would like to be emailed about offers, events and updates from The Independent. Other fasting protocols followed by the group include "Leangains", where a person fasts for around 15 hours; the "Warrior Diet" 20-hour fast followed by a large evening meal; and "The Himalayan Fast" for 60-hours straight. "Most people think that my regimen is crazy and that it is impossiblem”, Geoffrey Woo CEO and co-founder, of Nootrobox supplements, told The Independent, but urges that it is “100 per cent safe." You can think of it like 'turbo' mode for survival and it's more efficient for our cells.” open image in gallery Nootrobox founders Geoffrey Woo and Michael Brandt fast for at least 36 hours a week In fact, he believes fasting is important in desensitising ourselves to advertising and the culture which tells us to eat all the time. We all have the ability to fast; it's just that the vast majority of us have never used it.” open image in gallery The WeFast group meets every Wednesday in San Francisco to end their water fast Woo admits that it was tough at first, but that overcoming his urges was "mentally and physically liberating."