I've been meaning to write for a while. I am 52 and have sensitive skin. I've wanted to try a Vitamin C product for some time, but have been worried about any reaction it might cause. After having tried your Hyaluronic Acid last November and now being on my 3rd bottle without any issues with my skin, I decided to try your new 2 phase serum. I have been using it every day, once a day in the morning, for almost four months. I've had zero reaction, and my face feels nicely moisturised when I've finished applying it. After a month of use, I thought it was a nice product, but that at the price, I probably wouldn't be re-purchasing because I saw no significant improvement in my skin. THEN, about 2 weeks after that, I realised I could no longer see three quite prominent scars that had taken ages to clear from some spots I had three months ago. I'm sold. I will continue to use it. I love that it is free of lots of chemicals, doesn't react with my uber sensitive skin, isn't highly fragranced, and delivers results. I can't wait to see how my skin looks at the end of summer. Well done!