The Patch Test is something that you're likely to see on the back of products if you're someone who reads labels.
The Patch Test is something that you're likely to see on the back of products if you're someone who reads labels. Simply put, it's a fool-proof way to check and see if your skin will turn red, become itchy, or swell due to an ingredient in a beauty product.
Kiehl's is an advocate of the patch test and it's something I recommend to anyone with dry, highly-allergic, or sensitive skin. Apply a small amount of product (about the size of a dime) to your arm (preferably the underside of your forearm), cover it with a Band-Aid, and keep an eye on the area for 24 hours.
I know it seems basic, but it works. You know the old saying about an ounce of prevention, right? If you don't, read more