If you're unsure how to build your skin-care routine—using Korean products or otherwise—start with the fundamentals before adding the good-to-have steps, like toner and serum. Amazon stock, pricing, and listed sellers can be volatile, so at Allure, we don't include any products that are not sold by either Amazon or the brand itself at the time of writing. For our list of the best Korean skin-care products, we considered each product’s performance across five primary categories: product ingredients and efficacy, packaging, fragrance, texture, and product wear.