Why SPF Matters Every Single Day
If we could only recommend one product to every patient, it would be sunscreen. Not a vitamin C serum, not retinol, not an expensive cream — sunscreen.
What UV damage actually does
Ultraviolet radiation breaks down collagen and elastin, the proteins that keep skin firm and smooth. It causes:
- Photoaging: fine lines, wrinkles, sagging
- Hyperpigmentation: dark spots, uneven tone, melasma
- DNA damage: increasing skin cancer risk over time
Up to 80% of visible aging is caused by sun exposure. The cream you skipped today could be a wrinkle in five years.
Cloudy days and indoor light
UVA rays — the ones responsible for aging — penetrate clouds and glass. If you sit by a window all day, you're accumulating UV damage. Even fluorescent lights and your phone's blue light contribute (though to a lesser degree).
How to choose a sunscreen
Look for broad-spectrum SPF 30+. PA rating (PA+++ or PA++++) indicates UVA protection — important for pigmentation prevention.
Two main types:
- Mineral (zinc oxide, titanium dioxide): sits on skin, deflects UV. Good for sensitive skin.
- Chemical: absorbs UV. Often more cosmetically elegant — invisible finish, no white cast.
How to apply correctly
Most people use too little. The standard recommendation is two finger-lengths for the face and neck. Reapply every 2 hours when outdoors, immediately after swimming or sweating.
Apply as the last step in your morning routine, after moisturizer, before makeup.
A small daily habit, decades of difference
Sunscreen is the single most powerful anti-aging tool we have, and it's available now — not in a future product or treatment. Make it the one habit you don't skip.
