I doubt that lack of willpower is often the issue. Even a slightly more efficient metabolism can lead to 5 lbs per year of additional weight with no increase i

I doubt that lack of willpower is often the issue. Even a slightly more efficient metabolism can lead to 5 lbs per year of additional weight with no increase in caloric consumption. That adds up quickly. Properly balancing caloric efficiency at a young age is probably far more effective long term and honestly likely more pragmatic.