Wow!!! Finally, a serum that brightens and moisturizes without the stinging! I have pretty sensitive skin and trying a few other vitame c serums, I was about to give up due to the stinging/burning and red bumps as a result of the product being too potent. Even trying a lower percentage of vitamin C serum proofed too much for my skin type. I was about to give up until I found this product! It's very hydrating. I use it at night after applying my usual moisturizer. And I wake up with very soft skin. Even my skin tone has improved tremendously. I don't notice a huge difference for wrinkles but I just ordered their skin firming serum for the purpose of that. I definitely recommend this for anyone with sensitive skin who wants a serum that their skin can actually tolerate with amazing results.