Some of us have developed a sensitivity to fructose. Different fruits have varying amounts of the stuff, but apples are among the worst for high fructose content. And any high fructose corn syrup whatsoever is exceedingly troublesome to digest. I bet that with all the HFCS people are now consuming, plus the super-sized so-called healthy fruit juice drinks, more people will develop the sensitivity to fructose but won't know what's wrong with them.