Injectable fillers are minimally invasive cosmetic treatments designed to add volume, smoothen lines, and enhance facial contours. Comprised of various substances such as hyaluronic acid, collagen, or calcium hydroxylapatite, these fillers are injected into targeted areas to address wrinkles, folds, and hollows, providing a more youthful and rejuvenated appearance. They are commonly used to augment lips, cheeks, and jawlines, and results typically last several months to a year depending on the type of filler used.