Some By Mi Yuja Niacin 30 Days Brightening Starter Kit is a travel-sized set of Some By Mi’s flagship Yuja Niacin products comprises toner, serum, gel cream and sleeping mask, all infused with yuja extract as well as glutathione and arbutin for a bright, wrinkle-free finish. Directions: -Yuja Niacin Toner: Apply 2-3 drops to clean skin. Gently pat into skin until fully absorbed. Use morning and night. -Yuja Niacin Serum: Apply 2-3 drops to clean skin. Gently pat into skin until fully absorbed. Use morning and night. -Yuja Niacin Gel Cream: Apply an appropriate amount to cleansed (and toned) skin. Pat into the skin until fully absorbed. Use in the morning and at night. -Yuja Niacin Sleeping Mask: Apply an appropriate amount to face and neck and let it absorb overnight. Do not rinse.