Which Filler is Best for Volume Loss in Cheeks?

36 year old female that looks 27. I take very good care of my skin but have noticed a small amount of cheek sagging in the last year. I am also trying to lose 20lbs and im afraid that my cheeks will sag more. Will filler in my cheekbone area lift my cheeks a little or at least keep them where they are at now with maintenance. I'm confused on where to start. I want something long-lasting but non- surgical. I didn't send a picture because you can't see any sagging in the picture.