Following the theory that more sugar consumption → obesity (or being overweight in general) → assorted expensive health issues wouldn’t it make sense that the negative externality would be increased health insurance costs to people you participated in a plan with? (Assuming it’s not just one person doing it?) Or lost work costs to an employer?

I never really paid attention in Econ (thank you any class with a lot of graphs for the easy tests) but it doesn’t seem like rocket science.