Figure 2.

Dandelion leaf and flower extracts protect HDFs from UVB irradiation-induced damage. Dandelion extracts at the indicated concentrations were added 30 minutes before UVB (200 mJ/cm²) (b) or promptly after UVB radiation (c). Cell viability was measured by MTT 24 hours after culture. ^# P < 0.05 versus control; ^* P < 0.05 versus UVB only. Images in (a) were taken under microscope showing UVB irradiation damages cells, but dandelion leaf and flower extracts (300 μg/mL) protected the cells added from either before or after UVB radiation. Under UVB irradiation, the cells became smaller and less in number. Scale bar: 20 μm. n = 3.