Sunscreen is the final and most important step of morning care. The "chemical versus mineral" debate occupies everyone, but the truth is duller: both types work, and the amount decides. Most people apply too little sunscreen — and get protection other than what is on the label.
Choose broad-spectrum SPF 30+, water-resistant. Chemical and mineral both protect; mineral (zinc oxide, titanium dioxide) is advised by dermatologists for sensitive skin. More important than the filter type is the amount: for the face you need about ¼ tsp (the three-finger rule), apply it as the last step 15 minutes before heading out and reapply every 2 hours.
01Chemical or mineral
The difference is in the active filters. Mineral (physical) ones contain zinc oxide and/or titanium dioxide. Chemical ones — other filters (for example, avobenzone). Both form a protective layer; either is effective if it is broad-spectrum, water-resistant and SPF 30+.
Types of filter
Mineral
- Filters
- Zinc oxide, titanium dioxide
- Plus
- Gentler, dermatologists advise it for sensitive skin
- Minus
- A white cast is possible
Chemical
- Filters
- Avobenzone and others
- Plus
- Lighter texture, no white cast
- Minus
- More often irritates reactive skin
What to chooseFor sensitive and irritation-prone skin, dermatologists advise mineral (zinc/titanium), fragrance-free. For everyone else, any that you are comfortable applying every day will do — that matters more than the filter type.
02The main thing — amount and application
- For the face, ears and neck — about ½ tsp; for the face alone a guide is ¼ tsp (the three-finger rule).
- Apply about 15 minutes before heading out — the skin needs time.
- Sunscreen is the last step of morning care, over the cream.
- Reapply every 2 hours in the sun and immediately after swimming/sweating.
- A high SPF (50) partly compensates for the fact that almost everyone under-applies.
Tinted sunscreens with iron oxide additionally protect against visible light — this matters with pigmentation and melasma. Why sunscreen at all — in the basic guide: why sunscreen is needed.
03What to try for your skin type
Dry and normal skin
Oily and acne-prone
Sensitive skin
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04Common questions
Is mineral better than chemical?
Not "better" — different. Both protect equally at SPF 30+ and broad-spectrum. Mineral is gentler for sensitive skin; chemical is lighter in texture. Choose the one you are comfortable applying every day.
Is the SPF in a cream or foundation enough?
Usually not: they are applied in too small an amount for the stated SPF and rarely reapplied. Better a separate sunscreen in the right amount, with SPF products as a nice bonus.
Drawing on dermatological sources:
- How to apply sunscreen — SPF 30+, broad-spectrum, ~amount, application 15 min before, reapply every 2 h; iron oxide against visible light. AAD.
- How to decode sunscreen labels — chemical/mineral/hybrid; mineral for sensitive skin. AAD.
- Sunscreen FAQs — SPF 30 blocks 97% of UVB; a high SPF compensates for under-application. AAD.
This material is educational and does not replace a consultation with a dermatologist.