Honestly very disappointed by Jawliner on this one.
The gum is extremely hard at first, like a piece of rock that breaks, then only after adding a bit of saliva you can actually chew it but it doesn't have much chewiness and rapidly isn't that strong/hard.
Does it give your jaw a training? Yes but that's about it.
The flavoring fades away in literal seconds and it leaves a very unpleasant lingering plastic taste like I was at the dentist for an hour.
Plus it contains Titinium Dioxyde !! Why...