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FAQs

What does SPF mean and how does it protect my skin?

SPF stands for Sun Protection Factor. It indicates how well a sunscreen protects skin from UVB rays, the main cause of sunburn. SPF does not measure UVA protection, so choose a broad-spectrum product that protects against both UVA and UVB.

What SPF level should I use daily?

Dermatology experts commonly recommend at least SPF 30 for daily use. For extended outdoor exposure, choose SPF 50 or higher.

How much sunscreen should I apply and how often should I reapply?

Apply a generous, even layer to all exposed skin. For the face and neck aim for roughly a nickel-sized amount (or follow the two-finger rule) and don’t forget ears, hairline, and neck. Reapply every two hours during continuous sun exposure and immediately after swimming, toweling off, or heavy sweating.

When in my routine should I apply SPF and can I wear it under makeup?

Apply sunscreen as the final step in your morning skincare routine, after serums and moisturizers and before makeup. If you use a moisturizer with SPF, it should still be the last skincare step. Makeup can be layered over sunscreen once it has absorbed.

What’s the difference between physical (mineral) and chemical sunscreens?

Physical (mineral) sunscreens use zinc oxide and/or titanium dioxide to reflect and scatter UV rays and begin protecting immediately upon application. Chemical sunscreens absorb UV radiation and convert it to heat and typically require about 15 minutes to become effective. Choose based on your skin type, sensitivity, and texture preference.

Can I use SPF with active ingredients like retinol, Vitamin C or acids?

Yes. Sunscreen should be worn every morning regardless of the active ingredients in your routine. Many actives increase sun sensitivity, making daily broad-spectrum SPF essential. Retinol and exfoliating acids are typically used at night, followed by SPF use the next morning.

Are sunscreens suitable for sensitive or acne-prone skin?

Yes. Look for formulas labeled non-comedogenic, fragrance-free, or designed for sensitive skin. Mineral sunscreens and lightweight, oil-free formulas are often well tolerated by acne-prone or reactive skin. Dermalogica’s sun care products are formulated to protect while supporting overall skin health.

Should I use SPF 30 or SPF 50?

SPF 30 provides strong UVB protection suitable for daily use, while SPF 50 offers slightly higher protection and may be preferred for extended outdoor exposure or high-sun environments. Proper application and regular reapplication are more important than small differences in SPF level.

Does sunscreen expire and how should I store it?

Yes. Sunscreen loses effectiveness over time. Always check the expiration date and discard products that have changed in color, texture, or smell. Store sunscreen in a cool, dry place away from prolonged heat or direct sunlight.

Do I need SPF on cloudy days or when indoors near windows?

Yes. UVA rays penetrate clouds and many types of window glass and contribute to premature skin aging. Daily broad-spectrum SPF is recommended even on overcast days and when spending time indoors near windows.