Why SPF Is the Most Important Step You're Skipping

If you only commit to one anti-ageing habit, make it this one. Daily sunscreen, explained.

Dermatologists agree on remarkably little — but they agree on this: daily sunscreen is the single most effective anti-ageing step.

## The science Up to 80% of visible skin ageing is caused by UV exposure. Sunscreen protects against fine lines, uneven tone and loss of firmness before they ever appear.

## Mineral vs. chemical Mineral filters like zinc oxide sit on the skin and reflect UV — gentle and ideal for sensitive skin. Chemical filters absorb UV. Both work; the best one is the one you will reapply.

## Every day, not just summer UVA rays pass through clouds and windows year-round. Daily SPF 30 or higher is non-negotiable, even on grey days.

## Make it effortless Choose a weightless formula that layers well under makeup, and it stops feeling like a chore. Protection should feel like nothing at all.