I think focusing on anything solely is detrimental but focusing on exercise as an aspect is good. - eat a bit less food - eat food that is higher on the satie

I think focusing on anything solely is detrimental but focusing on exercise as an aspect is good. - eat a bit less food - eat food that is higher on the satiety index - eat food that has less easily absorbed calories/less processed/etc - build muscle to raise your resting metabolic rate slightly - sleep well etc I think a bit of everything with mostly a focus on less calories will be easier to adopt than just telling people to track calories into perpetuity and feel like they're starving for a good while.