Bought this because I've been using vitamin c for antioxidantion but wanted to try something different. I chose this serum because has 2% Alpha Arbutin, which is 10X more powerful than Beta Arbutin. So compared to other serums that just states arbutin in their ingredient list but doesn't specify which type, I trust this one better. So far I'm really happy with the result :) I use it in the morning before sunscreen and it helps alot with the dullness and 'yellow' complexion I get by the end of the day. It also has a very nice texture that's both hydrating and quickly absorbed. Really glad I gave it a try and will definitely repurchase!