Life An NFL star says he lost 100 pounds on a ‘water fast.’ Experts warn not to try it. June 13, 2023 Hannah Yasharoff, USA TODAY Comments Off on An NFL star says he lost 100 pounds on a ‘water fast.’ Experts warn not to try it. Super Bowl champion Russell Okung says he lost more than 100 pounds on a 40-day "water fast." Here's what you need to know before trying it.