SPF / Sunscreen Filters

What it is

Sunscreen filters fall into two broad categories: chemical filters, which absorb UV radiation and convert it to heat, and mineral filters (zinc oxide and titanium dioxide), which sit on the skin's surface and primarily reflect/scatter UV radiation. Many modern formulas blend both filter types to balance texture, protection breadth, and cosmetic finish. SPF (Sun Protection Factor) is a measure of UVB protection specifically; 'broad-spectrum' indicates the product also protects against UVA.

What it does

Sunscreen filters — chemical (organic) filters like avobenzone or octocrylene, and mineral (inorganic) filters like zinc oxide or titanium dioxide — absorb or reflect UV radiation before it can damage skin. SPF measures protection against UVB specifically; broad-spectrum labeling indicates UVA protection as well.

Who it’s for

Everyone — sunscreen is widely considered the single most consistently recommended step in any skincare routine, regardless of skin type, age, or climate.

Possible benefits

• Daily UV protection is one of the most consistently recommended habits in general skincare guidance
• Broad-spectrum formulas address both UVB (burning) and UVA (deeper, aging-associated) radiation
• Mineral filters are often chosen for sensitive skin or reactive-skin routines
• Regular use is widely considered foundational to any long-term skincare approach

Irritation & compatibility considerations

Chemical filters occasionally cause stinging or breakouts in some people, particularly around the eyes; mineral filters are generally considered gentler for sensitive or reactive skin but can leave more of a visible cast, especially on deeper skin tones, depending on the formulation. Reapplication throughout extended sun exposure is part of standard guidance, not just initial application.

How it fits into a routine

The final step of a morning routine, applied after moisturizer (and after any vitamin C or other morning actives) and before makeup. General guidance recommends reapplying roughly every two hours during direct, extended sun exposure.