Daily photoprotection to prevent photoaging
Jean Krutmann1,2, Sérgio Schalka3, Rachel Elizabeth Beatrice Watson4,5,6
1IUF Leibniz Research Institute for Environmental Medicine, Dusseldorf, Germany.
Photodermatology, Photoimmunology & Photomedicine
|April 25, 2021
Summary
Daily broad-spectrum sunscreen with antioxidants and anti-aging ingredients effectively reduces extrinsic skin aging. This photoprotection guards against UV, infrared, and pollution, proving safe for daily use and vitamin D synthesis.
Area of Science:
- Dermatology
- Cosmetic Science
- Environmental Health
Background:
- Extrinsic skin aging (photoaging) is traditionally attributed to ultraviolet (UV) radiation.
- Emerging evidence highlights additional contributing factors to photoaging.
- Clarification is needed on optimal daily photoprotection strategies.
Purpose of the Study:
- To review scientific evidence on daily photoprotection for extrinsic skin aging.
- To identify product-level requirements for effective photoprotection.
- To assess ecological and toxicological risks of daily photoprotection.
Main Methods:
- Systematic review of existing scientific literature.
- Critical evaluation of evidence on photoprotection efficacy.
- Analysis of potential risks associated with sunscreen ingredients.
Main Results:
- Broad-spectrum protection (UVB, UVA, UVA1, visible light, IRA) is essential to prevent extrinsic aging.
- Exposome factors like pollution and smoking also drive skin aging.
- Sunscreen should include antioxidants and anti-aging actives; pigments like iron oxide may aid melasma prevention.
- No conclusive evidence suggests daily sunscreen is unsafe or impairs vitamin D synthesis.
Conclusions:
- Daily broad-spectrum sunscreen with antioxidants and anti-aging ingredients effectively combats extrinsic skin aging.
- Comprehensive photoprotection addresses multiple environmental stressors.
- Current evidence supports the safety and efficacy of daily sunscreen use.
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