Is There a Cumulative Effect with Juvederm?

the filler itself does not accumulate, but the actual procedure induces more of your own collagen as you have continued treatments.

Certainly you can overaly Juvederm on top of previously injected material. It is also thougth that overtime, the collagen under the skin is stimulated as well.

Juvederm acts by acting as a space occupying material which attracts water. Although it also acts by causing the body to produce some collagen each time it is injected, that is NOT its major mechanism of action. After multiple Juvederm injections, the recurrent creation of collagen may result in some residual permanent filling.

It should be generally assumed that all of the Juvederm you receive will be absorbed by the body. In other words, the effect is not permanent and will not last. There is some speculation that repeated injections may stimulate collagen growh in the field injected. This collagen may or may not be cosmetically significant.

Hyaluronic acid fillers like Juvederm cause a gradual stimulation of collagen over time. This is best accomplished if you start with a full correction and touch up as needed, regularly. The same is true of Restylane.