Because, at the end of the day, calories are what cause weight gain. Consider if you had a pet and you were to put out twice as much food for every feeding. I

Because, at the end of the day, calories are what cause weight gain. Consider if you had a pet and you were to put out twice as much food for every feeding. It gets even worse if you think about cultural aspects, like teaching kids to make a "happy plate", which condition them to eat everything served to them. Sure, studies have not been able to show strong evidence of a causal link between portion size and obesity.[1][2][3] But it's hard to ignore that American obesity rates and portion sizes have increased over the same period of time. And, at the very least, decreasing portion size probably helps with maintaining weight. [4] [1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4224223/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4224223/ [2] https://www.cdc.gov/nccdphp/dnpa/nutrition/pdf/portion_size_research.pdf https://www.cdc.gov/nccdphp/dnpa/nutrition/pdf/portion_size_... [3] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4105579/ https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4105579/ [4] https://pubmed.ncbi.nlm.nih.gov/35387692/ https://pubmed.ncbi.nlm.nih.gov/35387692/