The lightest-to-heaviest rule worked when skin care was simpler. In 2025, there are some new things to think about when you’re layering products.

“Broken skin barriers” are real. They’re the subject of great interest from " skinfluencers " on TikTok, but they’re also ...

Your skin barrier is the outermost layer of your skin and performs complex functions that impact almost every organ system. It is your primary barrier against infections, injuries, and toxic ...