The FDA Nutrition Facts Label lists "Total Sugars" (natural + added) and "Added Sugars" separately. 4 grams equals roughly 1 teaspoon.
Look for ingredients ending in "-ose" (glucose, fructose, maltose) or terms like corn syrup, molasses, and fruit juice concentrates on the American Heart Association website. How Much Sugar Is Too Much? - American Heart Association esugajfzip
However, if you are looking for information related to "sugar content" (a phonetic similarity), The FDA Nutrition Facts Label lists "Total Sugars"