Libertarian approach to National Obesity rates

Hey y’all, I’m doing a project for my government class and I have been tasked with asking different political groups what their approach to issues would be, in this case 40% of Americans being obese. How would you solve this issue? Is it an issue? Would your solutions have any affect on civil liberties, markets, consumer choice?

Obesity is estimated to kill around 300k Americans annually in various forms of heart disease and other internal diseases. I would appreciate your insight.