Chewing gum is said to intensely strengthen the jaw and visibly widen the lower face for more sculpted features.

noli's read

It is true that regular chewing actively works the jaw muscles. A 2024 randomized controlled trial (RCT) conducted by Yonsei University confirms that chewing gum increases chewing force. Nevertheless, the researchers of this same study found that it had no impact on facial muscle thickness or jaw shape. The widening or feature-defining effect promised by this practice is therefore very largely exaggerated. In reality, our face shape remains dictated by our skeletal genetics and the overall distribution of our body fat. Furthermore, over-exerting the jaw through constant chewing can lead to facial tension and uncomfortable wear.

the sources

No named source held this one up — that absence is part of the verdict.