Can Vaping Cause Dehydration? Yes, vaping can cause dehydration. The primary reason lies in the ingredients found in e-liquids: propylene glycol (PG) and vegetable glycerin (VG). Propylene Glycol (PG): This compound is hygroscopic, meaning it absorbs moisture. When you inhale vapor containing PG, it can draw water from your mouth, throat, and airways, leading to […]