I don't have sugar in any beverage and not even on cereal. You can actually taste the sugar, manufacturers put it.
This goes back forty years, when I was making myself a coffee one morning, a spoonful of Nescafé, two spoonfuls of Coffeemate and two of sugar in a cup. I looked down at it told myself, "this can't be doing me any good." So I gave up with the sugar there and then. Those like me who don't take sugar, will screw their faces up if given a cup of tea or coffee with sugar in it. Same reaction to some who like sugar but have been given a drink without it. So it must be a bit of an addiction.
It cut down on dental treatment immediately. I rarely have to have anything done.