Loss of facial fullness with fat loss can make the face look older; while you can?t significantly ?build? facial muscles, you can improve appearance by maintaining good nutrition (adequate protein, healthy fats), staying hydrated, and using skincare with ingredients like Hyaluronic acid or Retinol to support skin elasticity. Gentle facial exercises may help tone slightly, but for noticeable results, dermatologists may suggest treatments like fillers or collagen-stimulating procedures.