Zinc Oxide
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Zinc Oxide is a physical sunscreen that works by reflecting and scattering UV rays. It protects against the full spectrum of UVA and UVB. Zinc Oxide does a better job than Titanium Dioxide at blocking out the often less talked about UVA. UVA is becoming increasingly looked at as an important player in sun-induced damage, and blocking it out in addition to UVB is essential for complete protection
Zinc Oxide based sunscreen is extremely safe, and can be used in all ages (besides infants < 6 months). It is also photostable, and has a lesser risk of sensitization than chemical sunscreens. Compared to other physical sunscreens, Zinc Oxide is preferable cosmetically, as it leaves the least ‘white’ appearance on the skin. The only possible adverse effect is that it may worsen or cause acne in some individuals by clogging pores. Some claims state that the nanoparticles of Zinc oxide can penetrate the skin and cause systemic absorption, however recent studies have showed this to not be the case.
With its outstanding safety, and proven efficacy against a wide spectrum of UV rays, Zinc Oxide should be a first line choice when it comes to choosing a sunscreen.
References:
Zinc Oxide is a physical sunscreen that works by reflecting and scattering UV rays. It protects against the full spectrum of UVA and UVB. Zinc Oxide does a better job than Titanium Dioxide at blocking out the often less talked about UVA. UVA is becoming increasingly looked at as an important player in sun-induced damage, and blocking it out in addition to UVB is essential for complete protection
Zinc Oxide based sunscreen is extremely safe, and can be used in all ages (besides infants < 6 months). It is also photostable, and has a lesser risk of sensitization than chemical sunscreens. Compared to other physical sunscreens, Zinc Oxide is preferable cosmetically, as it leaves the least ‘white’ appearance on the skin. The only possible adverse effect is that it may worsen or cause acne in some individuals by clogging pores. Some claims state that the nanoparticles of Zinc oxide can penetrate the skin and cause systemic absorption, however recent studies have showed this to not be the case.
With its outstanding safety, and proven efficacy against a wide spectrum of UV rays, Zinc Oxide should be a first line choice when it comes to choosing a sunscreen.
References:
- Baron, E. Selection of sunscreen and sun-protective measures. UpToDate. April 1, 2014. Accessed June 29, 2014 from: www.uptodate.com
- Kleiman, N. Prevention and Treatment of Sun-Induced Skin Damage. Chapter 64. CPhA Patient Self Care: Second Edition. Pages 619-627.
- Pinnell, Sheldon R., et al. "Microfine zinc oxide is a superior sunscreen ingredient to microfine titanium dioxide." Dermatologic surgery 26.4 (2000): 309-314