Response to DC Whiteman, CM Olsen and AC Green: In-Deed Wise To Get Some Sensible Sun Exposure

Abstract

Whiteman, Olsen and Green noted the Felton study (1) was short term and limited by the number of biopsies. What this study demonstrated was that even for only 6 weeks of repeated exposures to sensible suberythemal doses of simulated solar ultraviolet radiation (UVR), there was a marked increase in the skin's defense mechanisms to overcome the damaging effects caused by the DNA absorbing the UVR. Whiteman et al. acknowledge that within 24 hours after the final exposure the levels of photo damage were significantly lower.

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