Dr. Robert Lustig, Professor of Pediatrics in the Division of Endocrinology at the University of California, has been a pioneer in decoding sugar metabolism.
He’s become quite well-known in recent years for stating that excessive amounts of sugar in your diet has toxic effects. He’s also pointed out that processed fructose is far worse, from a metabolic standpoint, than refined sugar.
Now, new research [1,2] from the University of Utah confirms Dr. Lustig’s stance, showing that corn syrup is more toxic to female mice than table sugar. Not only did corn syrup adversely impact the animals’ rate of reproduction, it also caused premature death.
From a chemical standpoint, high-fructose corn syrup (HFCS) is similar to table sugar, but it does contain higher levels of fructose.
Manufacturers have long claimed that HFCS contains at most 55 percent fructose (and 45 percent glucose). This is very close to white sugar, which contains about 50 percent fructose (and 50 percent glucose).
That said, tests have revealed that the fructose level in HFCS can reach as high as 65 percent. It is this elevated fructose level is one piece of the explanation for why HFCS is so much worse for you than refined sugar.