Brand from Japan: DR Lala Grant. DR LALA Grant Serum is oil-free serum with chitosan, leading to healthy and moisturized skin.The serum also improves skin texture, moisturizes, and protects skin from external stimuli.Also recommended as a makeup base.How to use:After cleansing and toning, apply an appropriate amount to face and blend quickly.Basic: Use 1 bottle in 1 week to 10 days.Special: Use 1 bottle every 3 to 5 days.