The Nature of Things
      The Curious Case of Vitamins and Me (55x2)
      
      : 
      We all think we know vitamins – and we’re told they’re essential – but why do really need them and why can’t we produce them on our own? These are a few questions on the mind of intrepid filmmaker and health-freak Bryce Sage who travels from Washington, D.C. to San Francisco to get to the bottom of the vitamin mystery.