One of principal arguments food corporations have used to defend high-fructose corn syrup (HFCS) is that it is chemically similar to table sugar.

Manufacturers have stated repeatedly that HFCS contains at most 55 percent fructose, little different from white sugar's 50 percent fructose makeup.

But as it turns out, the specific amount of fructose in HFCS for any particular food product has never been officially tested. And when researchers tested brand-name sodas, they found that the fructose content is actually 65 percent.