Research published in The European Molecular Biology Organization Journal determined that insulin is probably the most important hormonal factor influencing the creation of fat, or what is scientifically called lipogenesis.
While sugar drives up insulin production, it fails to trigger another hormone in your body that helps control appetite: leptin. Without enough leptin, your “signaling center” breaks down, and you quickly end up with a traffic jam of food in your body ready to get stored as fat. Where this fat gets deposited depends on your genetics, but most of us start storing it in our midsection. Research published in the American Journal of Clinical Nutrition confirmed that foods sweetened with fructose, sucrose, glucose and high-fructose corn syrup all have the same effect on leptin -- they fail to produce it. Another study done at the University of California, Los Angeles (UCLA), discovered the same about lactose (milk sugar).
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