Product Safety
How to Patch Test a Skincare Product
Before using a new skincare product widely, apply the normal amount to a quarter-sized spot on the underside of your arm or bend of your elbow twice daily.
Product Safety
A familiar ingredient or reassuring label cannot guarantee that every person's skin will tolerate a product. Formulas and individual responses differ. These guides focus on small-area testing, label directions, one-change-at-a-time routines, and knowing when to stop and seek professional help.