There is still a lot to be learned about HFCS. Studies don't really focus on people who burn all the calories. Seems to be biggest issue is over excessive calories consumption, not HFCS alone. But because of the low cost of HFCS and consumer desire (increased by marketing) for sweets there are too many ways to get too many calories thru this processed calorie source. There is also backlash against HFCS not solely because it may be bad for you, but because its not naturally occuring, instead a raw output of indusrial agriculture.
Al