Compare the serving sizes and caloric intakes at a USA restaurant with those in Japan, for example, and you'll see why. It's not hard to figure out, we put HFCS and sugar in everything now and people eat 2x as much as they used to.

I lost 30 pounds over 2 years by being hungry non-stop and walking about 3 miles per day to work, so losing weight isn't just a "pill disease" that we can solve with a pill, it requires a person to have the self-control to be hungry and exercise, and (from experience) over-eaters don't tend to have much self-control in that area.

I think obesity should be treated more as a mental health issue than physical (for most people, there are exceptions), because there is no better way to lose weight than diet and exercise and doing it at a slow rate.

Obesity is an example of a problem like climate change. We know how to solve it (less sugar, better food, less calories, more moving) but no one wants to take those steps. I feel like this will also fall back onto the food companies, who will probably be reviled in 50 years like the tobacco companies are today.