How long does the actual effect last after lip and cheek filler treatment?

Hello neighbors. As I get older, my cheeks have sunken and my lips have lost volume, causing me to feel stressed about my overall lifeless appearance. I am seriously considering a filler procedure that can quickly and smoothly fill in these sunken areas without surgery.

Since it is a hyaluronic acid component that is gradually absorbed into the body, I want to find out in advance how long the filler maintains the beautiful volume and lines after a single treatment.

Is there a significant difference in volume retention or filler lifespan depending on whether it is a domestic product or a premium foreign product line? If anyone knows how many months it usually lasts for each area, I would appreciate it if you could share.