Eh... fructose is a completely natural substance. Fruit, berries, root vegetbales all contain it, mostly bound to glucose in the disaccaride sucrose. Which is split into glucose and fructose in the intestines. Fructose-phosphates is also produced during the breakdown of glucose in cells.
OTOH, adding it as a sweetening substance, claiming that it's better than glucose is another issue. And trans fats are bad, of course.
Ah, my misunderstanding, given the name of course it's naturally occurring . . . . I have vague recollections of some particular sugar variation being added to fizzy drinks that's worse than just glucose, is it fructose I'm thinking of or something else?