I find it interesting to read the labels on processed foods. So much crap, and can we really trust them?
For example, the ( in Europe) upmarket orange juice Tropicana contains 10.8 grams of sugar per 100 ml. The German economy brand of fruitjuices, Rauch Happy Day, contain 9.4 gram per 100 ml.
So not a huge diffetence, but how come that Tropicana tastes far sweeter than the Rauch?
I suspect that many if those figures given are simply not true.
I suspect that the difference in the sweetness might be the actual meaning of the labels. Are they referring to ALL sugar? Or just ADDED sugar? If the latter, it's likely that Tropicana, being a more premium brand, started out with sweeter oranges (as in fresher oranges before the natural sugar converted to starches/carbs)
That said, the accuracy of the labels is only as reliable as the agencies regulating them (I don't trust any of them either, but for now, they're the best we've got)