What are some facts that would cause, an immediate update in beliefs and non trivial daily life application? I am looking for things that are relatively uncontroversial, things that people just aren't aware of and if they knew about it, they would change they way they feel about it immediately.

For example I just found out that 2/3rds of imported extra virgin olive oil is adulterated or not actually olive oil. Some brands that I recognize and have bought my whole life is not really extra virgin olive oil, therefore I never got the health benefits. Consumer reports and UC Davis tests show corroborating evidence that most cheap evoo is not what it claims to be. Knowing this, I will probably never again buy those brands who do not undergo voluntary quality testing and seek out to buy authentic evoo or at the very least attempt avoid overpaying for fake olive oil when I could just go with regular cooking oil. This article has information and links to the UC Davis testing results.