How do skin type and UV index affect sun protection?
Up to 80% of visible skin aging is ultraviolet’s work, not the calendar’s. That makes sun protection the best-proven anti-age care there is. Estimate your time-to-burn and the SPF you need.
Recommended SPF at this UV: 50. A burn isn’t just a week of discomfort: every episode adds photoaging and melanoma risk. Shade from 11 to 16 plus sunscreen beats willpower.
Sources: the Fitzpatrick phototype scale (1975); Flament et al., 2013 (UV drives up to 80% of visible aging); WHO on the UV index. The estimate is rough — water, snow and altitude speed up burning; reapply SPF every 2 hours.
How to use the result
How it works
We estimate time-to-burn from two inputs: your skin phototype and the current UV index.
How to read the result
Current UV index, shade, clothing and correct sunscreen reapplication are the useful anchors.
Limitations
The estimate cannot guarantee no burn. Show a changing mole or non-healing skin area to a clinician.
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Take the short health-factor map and see how this connects to your own lifestyle.