there was a town, in Mexico, San Cristóbal de las Casas irc, it was rather poor so when a Coca-Cola factory opened nearby Coca-Cola became cheaper than water so the villagers started drinking that instead. most them then became obese and diabetic . no other dietary change happened other than the introduction of sugar

but apparently despite this I'm still supposed to believe that sugar consumption is unrelated to diabetes because of some grain lobby backed study on lab rats.