Which of the following is an example of a filler made of hyaluronic acid?

The correct answer is Juvederm, as it is a well-known dermal filler made from hyaluronic acid. Hyaluronic acid is a naturally occurring substance in the body that helps to retain moisture, provide volume, and improve skin elasticity. As a result, fillers containing hyaluronic acid are often used in cosmetic procedures to enhance facial contours, reduce the appearance of fine lines and wrinkles, and provide a more youthful appearance.

Restylane is another dermal filler that also utilizes hyaluronic acid, making both Juvederm and Restylane valid examples. However, the context of the question may be focused specifically on one brand being more representative. It's important to remember that fillers such as Sculptra and Radiesse use different substances; Sculptra primarily uses poly-L-lactic acid, while Radiesse consists of calcium hydroxylapatite. These fillers serve different purposes and have different properties, which makes understanding the types of materials used critical in dermatology and cosmetic procedures.