A team at Princeton University did a study using rats to check out how the consumption of high fructose corn syrup (often used as a sweetener in sodas and other foods) effected obesity, and how it compared to other sweeteners like regular sugar…
Male rats in particular ballooned in size: Animals with access to high-fructose corn syrup gained 48 percent more weight than those eating a normal diet.
“These rats aren’t just getting fat; they’re demonstrating characteristics of obesity, including substantial increases in abdominal fat and circulating triglycerides,” said Princeton graduate student Miriam Bocarsly. “In humans, these same characteristics are known risk factors for high blood pressure, coronary artery disease, cancer and diabetes.”



