How do I test a new skincare product at home?

Try it on a small area first, such as the inner arm, and observe it over seven to ten days. This kind of home testing can reduce uncertainty, but it cannot predict every delayed reaction or breakout.

Home testing reduces uncertainty, but it is not a guarantee

Follow the product's directions, especially for anything you rinse off. A short test cannot guarantee that you will never react or break out later. Do not retry a product that previously caused swelling or hives without medical guidance.