Propylene Glycol vs. Glycerin: Key Differences, Uses & Safety Guide
Propylene Glycol is a synthetic, odorless liquid that grabs water; Glycerin (glycerol) is a natural, sweet-tasting humectant that does the same. Both keep products moist, but one’s petro-derived, the other plant or animal fat. Vapers squint at e-liquid labels, parents read cough-syrup fine print, and DIY skincare fans scroll recipes wondering which clear syrup is…