One session lasts one to four years depending on the type. That is the longest among skin boosters, because the material keeps prompting collagen while it slowly breaks down. Since it stays a long time, the placement and amount must be chosen carefully.

Volume appears the moment it goes in so the change is visible immediately, and collagen forms over the months that follow. Having both an immediate fill and long-term support is what characterises it. Bruising can last one to two weeks, and following the massage instructions helps the material settle evenly.

Sculptra does not fill at once — it builds up only through collagen. Ellansé fills the moment it goes in while also generating collagen, which suits wanting to see change straight away. Because it lasts so long it is harder to reverse, so starting with a small amount is safer.