What it is
However it's dressed — cane, beet, coconut, "evaporated juice" — it's sucrose: a bonded glucose-fructose pair. Position on the label tells you how much of the recipe it is.
Why your biology objects
Split 1:1 at the gut, so the fructose always arrives with its glucose escort — no free-fructose excess, which is why it ranks below agave and HFCS. But it's still fiber-stripped, concentrated sugar that spikes blood glucose; it earns its flag on dose and ubiquity, not a hidden fructose problem.