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Greater availability and affordability of unhealthier, more processed foods filled with carbs and fats and devoid of other nutrients. Car culture that discourages natural amounts of walking in a daily routine. Sugar, caffeine and alcohol addictions with advertisers preying on people vulnerable to addiction of every kind.
I was with you until caffeine. How does caffeine addiction contribute to the obesity epidemic? Are you talking about addiction to caffeine leading to people consuming more sugary soft drinks?
I’m probably being naïve because 100% of my caffeine consumption comes from black coffee and tea.
Caffeine CAN mess with a person's cortisol levels which CAN affect weight.
Not everyone is affected the same way. However there is the tofi problem. Look it up.