Does Coke makes you hungry?
A really interesting study about fructose's role in creating leptin resistance will be published in the American Journal of Physiology. Researchers at the University of Florida fed rats fructose, a type of sugar found naturally in fruit, and unnaturally in soft drinks. The control rats ate a normal rat diet without fructose. The rats who ate fructose became resistant to the hormone leptin, which signals the brain to stop eating when full.
The researchers then fed these same rats a high fat, high calorie diet, "the kind many Americans eat." Not surprisingly, the leptin resistant rats ate more, and gained more weight than the leptin sensitive rats.
Diabetes is a chronic disease that develops from insensitivity to the hormone insulin. Could obesity be caused by an insensitivity to leptin? The research hasn't proven that obesity is that simple, but leptin probably has some role.
What is really interesting about this study is that it links fructose to obesity. Not only is pop just empty calories, with no nutritional value, it may be causing someone to become obese. High fructose corn syrup isn't just in Coke, however, it is added to many foods. I think I'll start looking at the ingredient list even more carefully.