Will suggest everyone to put it in the refrigerator so it won't get oxidized. Just a while back I started using it regularly But earlier i used to use it just before i did makeup or went out Pretty great a product

This vitamin c gets a lot of slack, but I love it. First and foremost: Always keep refrigerated. I've never had one expire on me even after 5 months, but I've seen a lot of people report back theirs oxidizing when not refrigerated. It is also a weaker variety at 4% (so great for sensitive skin), and isn't one I'd recommend for someone trying to use vitamin c for any skin damage. However it does have a really neat ingredient in it that isn't vitamin c which also helps with cell turn over. However, if you're prone to skin cancer, it's recommended you do not use it because of that. I'd definitely check out the overall break down of the ingredients if interested in this product.