Trying to claim that e-cigs are better/healthier than regular cigs is not based on fact yet. There have not yet been enough studies.
There have been numerous of studies on rats/mice, none show any damage to E-Cig vapor. You are using the same substances (PG,VG) every day without noticing.
Take your toothbrush for example, read the label it will include - VG.
If you eat it in daily bases, how can is be harmful while in gas form?