BeautyExactly How to Patch Test Skin Care Products to See If They Cause Irritation By Claire James 1 Comment on Exactly How to Patch Test Skin Care Products to See If They Cause Irritation February 18, 2023 7 Min Read If you regularly read skin care stories, you’ve probably come across the often-touted advice to patch test new products before trying them. (It’s certainly… Read More