Although there is no scientific evidence to support this claim, chewing gum involves repetitive movements of the jaw muscles, which could potentially contribute to toning and strengthening them. The muscles in the jawline are responsible for chewing and controlling facial expressions, so it makes sense that exercising them could have a positive effect on the appearance of the jawline.
However, chewing gum alone may not be enough to achieve significant results. Incorporate other face exercises that specifically target the jawline for optimal results.
In addition, excessive gum chewing can lead to temporomandibular joint (TMJ) issues, which can cause pain and discomfort in the jaw.