Sun care should be simple, but the science is real.
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UV rays don't take a day off — and neither should your skin protection. That's why this page exists: to give you TL;DR versions of the latest research on sun care and skin health.
Because we know the truth:
Sunscreen wears off in a few hours.
Most people skip reapplication (and it shows)
Skin damage builds silently over time.
Daily sunscreen use can slow visible skin aging by 24% over 4.5 years.
This is based on a landmark randomized controlled trial where adults who wore broad-spectrum sunscreen every day had noticeably less skin aging compared to those who used sunscreen only occasionally.
Source: Annals of Internal Medicine, 2013 (“Sunscreen and Prevention of Skin Aging: A Randomized Trial”)
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Main findings: Several long‑term randomized controlled trials showed that regular sunscreen use reduces the risk of squamous cell carcinoma and melanoma, when used as part of a broader sun protection strategy.
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This means that consistent, correct sunscreen use (not just occasional vacation use) can meaningfully lower your risk of serious skin cancers.
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Main findings: In a large Norwegian cohort of over 140,000 women, using SPF ≥ 15 was associated with about 30% lower melanoma risk compared with using SPF < 15 during intentional sunbathing.
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This is why you should choose at least SPF 15–30+ for daily use and avoid low‑SPF products when you plan to be in strong sun.
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Main findings: In ~900 adults followed 4.5 years, those assigned to daily broad‑spectrum SPF 15 on face, arms, and hands showed no detectable increase in photoaging, with about 24% less aging than the discretionary‑use group.
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This means daily sunscreen can significantly slow visible aging of the skin over years.