Won't the chest fat graft look unnatural?

As I get older and lose weight, I think I also lose a lot of volume.

Usually, I try to cover as much as possible with additional pads or underwear padding. However, there are limits.

Is fat grafting more natural than inserting implants?

If you have a thin body, where exactly does the fat come from? The hips??

I'm also curious whether the skin compatibility during transplantation is suitable or if there are fewer side effects.

I'm wondering if once done, the volume will never disappear for a lifetime... and whether additional procedures are necessary.