The only way to cure the obesity epidemic is public education, and inform people. A whole food plant-based diet is the best diet identified by science so far in terms of treating obesity, and even heart disease and diabetes yet the public is still in 2019 going on 2020 largely unaware.
If you want to learn about this in a very relatable and none-formal way, this YouTube channel Krocs in the Kitchen from an american couple is quite fun (they lost 800 pounds combined) - https://www.youtube.com/channel/UC9vIrPTF0znhis-gsFB8l8Q