- Your skin barrier is a lipid-and-cell wall that locks in moisture and blocks irritants — when it breaks down, nothing in your routine works properly.
- The most common culprits are harsh sulfates, over-exfoliation, alcohol-based toners, and synthetic fragrances — often found in expensive products.
- Repair it with ceramides, hyaluronic acid, and niacinamide — and apply moisturiser on damp skin to seal hydration in.
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