This serum helps reduce signs of aging with its mild formula for sensitive skin. Contains retinol, retinal and bakuchiol to help boost skin elasticity with low irritation. Utilize patented technology of Elastic-Liposome to deliver active ingredients into the deep skin layer. Gives a non-sticky and moisturizing finish. Completed skin irritation testing and passed the vegan test. How to use: 1. After washing the face, apply a moderate amount of the serum and gently spread it on the face. 2. In the first 2 weeks, use a small amount of it once a day, and then increase the amount and frequency of using it after skin adaption.