Some of its key ingredients are 9% lactic acid, 0.5% succinic acid & 7% rosemary leaf extract. I found another gem to use when winter comes. This night serum is my skin’s savior from dryness & tightness feels especially every after washing my face. Although I have been using this serum every other night because if its active ingredients on it, I always have a pleasant experience and works out well on my skincare routine. My facial skin is hydrated & nourished. Will always consider this serum at night.