and how do they gain the weight without eating the necessary calories? it's not that much that you have to eat to become overweight when you don't watch your nutrition. three meals a day and many people are probably already at 2000 calories and more. add to that snacks, fast food and soda which a lot of americans are hooked on and you become overweight very quickly if your maintenance level starts somewhere around 2000-2500 calories and you don't move a lot. then people get used to the amount they eat, so they eat more to get that feeling of satisfaction again or out of stress or other factors.
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