Sculpt and maintain a strong jawline by making ROCKJAW® Stackables Tough Mastic Gum part of your daily routine. Back in the day, cavemen chewed on mastic, but with softer foods prevalent in modern times, our jaws aren't getting the exercise they used to. As a result, human jaw strength and size have decreased, and our biting force has weakened. Mastic chewing gum offers resistance training for our jaw muscles, improving jawline development, bite force, and even promoting nasal breathing.

This gum is 10 times stronger than regular gum and can be re-chewed twice for continued satisfaction. Hand-selected and made with 100% natural ingredients, it contains no sugar, sweeteners, aspartame, or soy. Its antimicrobial properties promote better dental hygiene and help eliminate bad breath. Our stackable solid crystals offer a more controlled chewing experience and come in 20g tins. We store all our mastic gum refrigerated to ensure it stays as fresh as possible. 

Also Included:

• A free Pro Training Program to boost your results fast
• Free one-on-one support via Instagram (@rockjawuk)
• 5-star customer support to answer all your questions. 

BACK IN STOCK! VERY LIMITED QUANTITY. Due to the rarity of hard mastic gum, we produce a very limited number of units per month of Stackables.