Dr. Andrew Huberman is a neuroscientist who has discussed the importance of jaw muscle training in achieving an attractive jawline and a beautifully defined face. However, there is no specific product called "Huberman Jaw Exercise" that he endorses or sells. Instead, he recommends jaw muscle training with the help of chewing gum, such as JAWLINER, which is a fitness chewing gum specially designed to work out the jaw and facial muscles. The JAWLINER gum is developed by the founder of JAWLINER and is the hardest and toughest chewing gum in the world, designed for professional jaw exercises. It is safe to use and has been tested by Dr. Mike Mew.

There are no specific ingredients or materials mentioned for the JAWLINER gum. However, it is designed to be tough and provide resistance to the jaw muscles during chewing, which is the key to strengthening the muscles involved in chewing and improving jaw stability.

It is important to note that while resistance devices like JAWLINER may increase jaw strength, they also come with potential risks. The jaw gets plenty of exercise throughout normal activities during the day, and adding even more exercise may put the muscles at risk of issues, which may include temporomandibular joint (TMJ) disorders. Therefore, it is recommended to consult a healthcare professional before starting any new exercise routine, including jaw muscle training.