Vape e-liquids, mainly composed of propylene glycol (PG) and vegetable glycerin (VG), break down when heated in e-cigarettes, producing harmful volatile carbonyl compounds like formaldehyde, acetaldehyde, and acrolein. These toxins form through thermal decomposition at high temperatures, often above 200°C in vaping devices, and can irritate the lungs, increase cancer risks, and contribute to respiratory […]