Figure 4

Quantitative analysis and comparison of skin THG intensities at five different depths. Black: Case E100-I90-1 (Before: N = 8, Post-glycerol: N = 8); Red: Case E100-I90-2 (Before: N = 9, Post-glycerol: N = 9). Inset shows an enlarged view of the statistical result. *P < 0.05; **P < 0.01; *** P < 0.001. Before: before treatment; Post-glycerol: after treatment.