What is Botox Jaw Slimming (Masseter Reduction)? Botox jaw slimming, also known as masseter reduction, is a non-surgical procedure gaining popularity in areas like Barnes, London. This treatment involves injecting Botox into the masseter muscles, which are located on either side of the jaw responsible for chewing. By temporarily paralyzing these muscles, Botox can reduce their bulk and create a slimmer, more contoured jawline. How it Works Botox jaw slimming, also known as masseter reduction, is a non-surgical procedure gaining popularity in areas like Barnes, London. This treatment involves injecting Botox into the masseter muscles, which are located on either…