@v.unsealed: Those letters sat in an archive for 50 years. In 2016, a dentist turned researcher found them. #sugar #dopamine #nutrition #harvard #hiddenhistory Sources: Kearns, Schmidt, Glantz, JAMA Intern Med 2016; Lenoir et al., PLoS ONE 2007. Images: NIH (PD); Anna Marchenkova (CC BY 4.0); see LICENSES.md