3 Reasons Not to Mix Sunscreen With Moisturizer

Mixing dilutes SPF protection Combining sunscreen with moisturizer or foundation creates an uneven film, reducing the protection below what the label promises.

It breaks the protective layer Sunscreen is designed to form a specific film on skin. Mixing it with another product disrupts that film, making it less effective.

Layering works instead Apply sunscreen first, let it dry, then add foundation on top. Or use a moisturizer with built-in SPF, which is tested as a single formula.