I have dry, acne-prone skin and need a hydrating product that controls sebum production. I got the Secret Key essence for an extra hydration step between BHA and moisturizer; previously I was using Missha FTE but it aggravated my acne and was very expensive. This product is deeply hydrating and calms any redness I may have. It absorbs very quickly and then skin is ready for moisturizer and sunblock. After I began using it I also noticed a reduction in acne and the amount of sebum clogging my pores. My skin is now much clearer and stays hydrated. I use this twice a day. On days I feel extra dry I use 2 layers. On more humid days if I will be outside all day, I can even skip moisturizer and just put sunscreen after applying this essence. I will probably repurchase as it is also more reasonably priced than similar products.
