Tool

Ingredient Conflict Checker

Select the active ingredients in your routine. We'll flag conflicts, suggest timing, and tell you what's safe to layer. Based on dermatological research and K-beauty community consensus.

Tap ingredients in your routine (0 selected)

Select 2+ ingredients to check

We'll show you what's safe to layer, what needs timing separation, and what to avoid entirely.

The K-beauty approach to layering

AM Routine

Cleanser → Toner → Vitamin C → Moisturizer → SPF. Protection-focused. Antioxidants in, UV shield on.

PM Routine

Oil Cleanse → Water Cleanse → Toner → Retinol OR AHA/BHA → Moisturizer. Repair-focused. Actives work while you sleep.

Golden Rule

Thinnest to thickest. Water-based before oil-based. Actives before moisturizers. SPF always last (AM only).