Patch testing describes a procedure to help identify what ingredients might irritate a person’s skin. Many skin care products contain chemicals that can cause an allergic reaction when a person ...

Some food for thought: On average, women use 12 personal care products daily, which amounts to about 168 chemical ingredients, according to the Environmental Working Group (EWG). Splurging on a new ...

Patch testing is currently used in clinical practice as the most important investigative and diagnostic method available for studying delayed contact hypersensitivity. It constitutes – together with a ...

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 a suggestion SELF has made more than once!) ...

In our study, the patients with the best clinical outcomes were the ones who had strong or extreme reactions on patch testing. In contrast, only 2 of 4 patients with questionable or weak patch-test ...