I used to be convinced that I had to torture my skin with tretinoin and ascorbic acid to stimulate collagen/elastin and keep it fresh. In the month that I have been using Furtuna Skin, I have changed my mind. No need to see flaking and inflammAging! My skin truly is luminous with twice daily use of the Furtuna micellar lotion, serum, biphase oil and balm. (In addition to good nutrition and sunscreen). Furtuna uses a milder form of vitamin C in their serum that is effective but not irritating. I wish CultBeauty would make the Day/Night Cream Duo available, since I am eager to try adding BAKUCHIOL (retinol substitute) to my routine.