It's hard to argue with results from 200,000 people: Not only do vitamin supplements do nothing to prolong life, they also appear to actively increase your risk of dying, albeit indirectly. This conclusion, from a 2010 Cochrane review of randomized trials, was so astonishing that researchers set out to confirm it with a longer study. And confirm it they did: Vitamins create "illusory invulnerability," the authors reported in the August 2011 issue of the journal Psychological Science. For example, people taking vitamins chose a buffet over an organic meal and exercised less.
Illusory invulnerability...Moral Hazard.
Despite my reluctance in saying this, as my sister-in-law is a psychologist, psychologists and economists really should talk to each other more. We're usually talking about the same things, with different big words.