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The efficacy of sunscreens can be measured by different methods, involving in vitro, ex vivo, or in vivo techniques. There is a need for a worldwide standardization of these methods to avoid misunderstanding and confusion among sunscreen users. The clinical benefits of sunscreens have been demonstrated in randomized controlled trials that established the role of sunscreens in the prevention of actinic...
The research summarised in this report suggests that the two UVB-absorbers, o-PABA and 2-EHMC, have different modes of protection against UV radiation-induced immunosuppression, carcinogenesis and histological alterations, that appear to be independent of their SPF values, within experimental limits. The UVB-absorber o-PABA appears offer a valuable level of protection against photocarcinogenesis.
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