An Evaluation of Root Phytochemicals Derived from Althea officinalis (Marshmallow) and Astragalus membranaceus as Potential Natural Components of UV Protecting Dermatological Formulations

Figure 2

Median percentage DNA damage in the tail of comets derived from cultured human skin fibroblasts incubated with no extract (NE), Astragalus extract W2 (AS), or Althea extract W2 (AL) for one hour followed by 0, 12, 15, or 18 minutes of filtered xenon-mercury irradiation (UVA + visible light). Bars indicate the 75 percentile of the data set. + indicates a statistically significant increase in damage () when compared with the NE dark control. indicates a statistically significant decrease in damage () when compared with the NE control at the same irradiation period.