Is Fructose to Blame for Obesity?

A recent article hypothesized that fructose causes more metabolic disease than does sucrose when overfed in the human diet. Fructose intake as high-fructose corn syrup (HFCS) has risen since its use in soft drinks in the United States and parallels the increase in the prevalence of obesity.

The newest hypothesis regarding fructose invokes a genetic survival of the fittest rationale for how fructose enhanced fat deposition exacerbates the increased caloric consumption from the Western diet to promote metabolic disease especially in our adolescent and young adult population. This theory suggests that fructose consumption causes low adenosine triphosphate, which stimulates energy intake causing an imbalance of energy regulation.

Caroline Apovian, MD

Ongoing interest in the association between the increased use of HFCS and the prevalence of obesity in the United States continues. The use of HFCS in sugary sweetened beverages (SSBs) has reduced the cost of these beverages because of technology in preparing HFCS from corn and the substitution of the cheaper HFCS for sugar in SSBs. Although SSBs haven't been proven to cause obesity, there has been an increase in the risk for type 2 diabetes, cardiovascular disease (CVD), nonalcoholic fatty liverdisease (NAFLD), and even cancer. Research in HFCS, weight gain, and metabolic disease continues despite little definitive evidence of causation.