The injection of hyaluronic acid fills the facial wrinkles and thus reduces them.
Here are the most wrinkles that are treated by this type of fillers injection:

The price for the injection of hyaluronic acid will depend on the type of wrinkle treated and the amount of acid required: the price per session will vary from 200 to 500 €.
An accurate assessment of your case and your needs will be made during your consultation and a precise estimate will be given to you.