Swear to God I am 52 this year. Only this past year I got some rather permanent wrinkles around my smile lines and so I thought yep, maybe it's time to try something new, and I just up and thought, well vitamin C, maybe? But all derms seem to dismiss it, no clue why (so-called lack of scientific evidence) because it is *amazing* I am using the one from The Ordinary, the 30% in silicon (non chunky, non pilling, it's smooth as a baby's bottom). You do have to watch that you do not have "open skin" like say from a busted pimple, because it will sting like a bee (no joke). But it's amazing. I did hear from their e-mails they are doing away with this, and it's the only smooth formula they have. It's really so amazing I got about 20 boxes (the tubes come sealed). I mean I go through a box about every 4 weeks (if I scrape the insides, otherwise 3 weeks per). I had been using a retinol for about a year already, but this? This is amazing for wrinkles!