I used mastic gum before this, but I wanted something that functioned more as an actual gum with flavor, so I was enticed. Actual Mastic Gum is a much better workout for your jaw, this might be a good way to work up to that, but considering the claim was that it was 15x harder than regular gum, and mastic gum is 8x harder... i'm underwhelmed. I will continue to chew this bag and hope that it positively affects my jaw, but if I'm looking for gum ill probably just buy regular gum, and if i'm looki...