I am 39 years old with fine lines and sun spots. I brought a 1 oz vial of the Serum Elastine to address the fine lines on my face. I did see some softening of my lines, but I was also using Serum Colostrum in my already Biologique Recherche packed routine (Lait EV and P50V). After I finished the vial, I did not notice the lines deepening or my skin getting worse from not using the serum; I also didn't really miss this product (which is why I took one star off). The good things are my skin had no adverse reaction to it and when you cocktail it with other serums, it can last you well over four months. I think overall I prefer Biologique Recherche masks over their serums. Of course, the four stars are not reflective of the services of Paul Labrecque. I will continue to buy Biologique Recherche from them. Definite five stars for Paul Labrecque.