The duration of the effectiveness of an injection of hyaluronic acid depends on the location of the treated wrinkles, depth and type of product used. We can answer “over a year” but it varies from 8 to 18 months .We increase the duration of the result by choosing the right crosslinking and the concentration of hyaluronic acid, moreover the right quantity. Deepening nasolabial folds will be filled with a highly crosslinked gel even volumizing. Today laboratories manufacturing hyaluronic acid injections products (also called “Fillers”) thereby, we can offer a wide range of products to meet all our requirements . The injections are renewed on average every year .The lip wrinkles for which we use a gel slightly crosslinked to prevent unsightly swelling may require a second injection 6 months later.