I have the same one. Went down the food rabbit hole in 2015. Cured my asthma and eczema and began completely distrusting science and the medical profession. 

Another one was learning that the U.S. has been run by the CIA since the 1940s. It made me realize that nothing in politics matters as long as there is an entrenched bureaucracy running the show. Ironically, it brought me great peace and calm knowing I had no say in what our govt does.