Among the square jaw Botox products in Korea, I was treated with Coretox, which has no resistance. I'm not sure if it's really resistant or it's better than the cheap one because I've only had it once, but I got it again after 4 months after getting it once, so I got it again, but maybe the cycle was a bit short, and it hurt a little. I felt uncomfortable, but it's been over 2 months since I got it, and it still feels a bit like that. Other than that, there were no side effects for my face shape, and I'm completely satisfied...