A good example is Yogurt.
Plain yogurt has 10g of sugars listed. But the ingredients are milk and active cultures. (whatever that means)
The sugar listed is natural sugars found in milk.
The one that has fruit has 44g !! Holy Moly. You would count "added sugar" as 30g! and take 15 points off your day.
I vote to have plain yogurt and top it with real fruit!