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✨ Appearance
How old is my skin?
Sun damage causes 90% of visible aging.
Rate each statement: 1 (strongly disagree) to 5 (strongly agree).
1I apply sunscreen (SPF 30+) daily, even on cloudy days.
2I've had multiple sunburns in my life.
3I smoke or have smoked regularly.
4I drink plenty of water throughout the day.
5I regularly use a moisturizer on my face.
6I get fewer than 7 hours of sleep most nights.
7I notice fine lines, wrinkles, or dark spots on my face.
8I eat a diet rich in fruits, vegetables, and antioxidants.
9I live or work in a high-pollution environment.
10I drink alcohol more than 3 times per week.
Skin aging: 90% is lifestyle
Only 10% of skin aging is intrinsic (genetics). The other 90% is extrinsic — UV, smoking, sleep, diet, pollution.
The biggest skin agers
- UV exposure (90%): Photoaging causes wrinkles, spots, sagging. Sunscreen is #1.
- Smoking: Reduces blood flow to skin, accelerates collagen breakdown
- Poor sleep: Skin repairs during deep sleep — chronic deprivation shows
- Sugar & processed food: Glycation damages collagen fibers
- Air pollution: PM2.5 particles cause oxidative stress and dark spots
What dermatologists actually recommend
- Sunscreen SPF 30+ — every single day (even indoors near windows)
- Retinoid at night — the only topical proven to build collagen
- Vitamin C serum — antioxidant protection from environmental damage
- Moisturize — maintains skin barrier function
Sources: Krutmann et al. (2017, exposome), Flament et al. (2013, perceived age), Fisher et al. (1997, photoaging mechanisms).