Why did electronic cigarette smoke much throat can dry ?

The main component of e-juice is vegetable glycerin, which is water-absorbent and will take away the moisture in the mouth when atomized at high temperature, naturally causing a sense of dryness in the tongue and throat. Glycerin (VG) and propylene glycol (PG) are both highly absorbent substances, and each person has different ability to secrete saliva in the mouth.  Some people have high secretory capacity, so they don’t feel thirsty.  PG and VG are healthy food additives. Flavors and fragrances mainly provide various tastes, while nicotine provides anti-addiction and throat-killing sensation.