To adequately shield skin from the sun, sunscreen needs to be a part of every daily skincare routine. Options include physical UV-reflecting ingredients, chemical UV-absorbing ingredients, or a combination of both, but the most important thing to look for on a label is the term "broad spectrum." This indicates full coverage from the entire spectrum of UVA and UVB radiation, whereas SPF only measures the length of time one is protected from the UVB rays responsible for sunburn.
* Haywood, R., et al, J Invest Dermatol 2006;121:862-868
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