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Oh lord yes
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We all get fat from genetics. Genes are directly responsible for converting blood sugar to fat.
Every aspect of weight, including influences on behavior, are caused by genes. Without genes, there'd be no learned behavior, it isn't a chicken and egg situation.
Excess calories are converted to fat. Fasting is required to speed the reverse. Apparently, prolonged exposure to shivering cold will speed fat loss, too.
Genes create the environment where calorie intake is preferred over a calorie deficit. Genes create a body which seeks food as a primary reinforced behavior - "taste, experience, and feeding" is the title of a behavioral psychology text.
losing weight is hard, your brain, as expressed by your genes, doesn't want to do it. There is no experience more personally triumphant in this overweight society, than getting an actual handle on your weight.