One treatment will usually achieve a noticeable effect, especially around the eyes, although the result will vary from person to person. In general the younger the skin, the better the blood supply and the better the result.
Skin age is not the same as actual age: genetic inheritance and external factors, such as smoking and UV sun damage cause skin to age at different rates for different people. A small number of clients do feel that they have had no response after their first treatment.
A second treatment usually after 1 month may well improve the result considerably, although of course nothing can be guaranteed.In the many cases where one treatment does achieve a result, this can be improved by keeping the collagen building.
A follow up treatment may be recommended between one and three months depending on the area being treated. Young skin may need less frequent top ups.