So far so good. I’m in my early thirties, so honestly wrinkles haven’t been a huge problem for me quite yet (after 2 kids, I’m getting there though!), however I do try to take preventative measures pretty seriously. This serum leaves my skin feeling delightful and nicely moisturized (not too much, not too little). I get a little skin congestion now and then, and I have noticed that it seems to have helped stave that off while I’ve been using it. I don’t know the science behind AC-11, so can’t comment on that, all I know is that I love the way my skin feels after using this.