I had the same experience as this quote below when I was doing a coast to coast driving trip - years ago, and that is when I found out almost all gum has the artificial sugars.
I did find one quick mart with Beeman's:
INGREDIENTS: Sugar, Gum Base, Natural and Artificial Flavoring, Glycerine, Soy Lecithin and BHT (to maintain freshness).
Quote from:
http://scientificpsychic.com/blog/?p=318
Wrigley’s and many other manufacturers have changed their chewing gum formulations and added artificial sweeteners like aspartame and acesulfame potassium (acesulfame K). I looked at a whole aisle of gums, including Eclipse which is also made by Wrigley, and Stride made by Cadbury Adams USA, LLC. I could not find a single pack of mint-flavored gum in the whole drugstore that did not have artificial sweeteners. [edit: snipped disinformation]
Why are these artificial sweeteners added? Look at the ingredients of Wrigley’s spearmint gum: sugar, gum base, dextrose, and corn syrup account for 98% of the ingredients. The sugar, dextrose, and corn syrup are all very sweet, but they dissolve very fast when the gum is chewed. The artificial sweeteners stay around and give a long-lasting sweet sensation. A stick of gum weighs 2.7 grams; sugars account for 2 grams (74% of the weight) and provide 10 calories.