Vegetable glycerin is safe for disposable vaping.
The main components of e-cigarette liquid are vegetable glycerin (VG), propylene glycol (PG), essence, nicotine (optional), and water.
PG, VG, and flavors are very common drugs and food additives, which are generally safe for the human body.
Nicotine is indeed addictive, but smoking is not caused by nicotine. The real killer is tar and carbon monoxide produced by smoking, and these two substances do not exist in the use of electronic cigarettes.
E-cigarettes are at least 95% safer than traditional cigarettes, according to all international medically assessed evidence provided by expert organizations such as Public Health England, the Royal College of Physicians and General Practitioners, the British Medical Association and Cancer Research UK.