www DOT naturesflavors DOT com/product_info.php?cPath=3&products_id=4723
"Propylene Glycol is a traditionally used as a food additive. Recently Propylene Glycol has enjoyed some popularity as the main ingredient/base for e-juice, and e-liquids.Because Propylene Glycol is NOT a natural product. We recommend using our Natural Vegetable Glycerin, instead of Propylene Glycol, because it can be used as a substitute for Propylene Glycol in most (but not all) applications."
"Propylene Glycol is a traditionally used as a food additive. Recently Propylene Glycol has enjoyed some popularity as the main ingredient/base for e-juice, and e-liquids.Because Propylene Glycol is NOT a natural product. We recommend using our Natural Vegetable Glycerin, instead of Propylene Glycol, because it can be used as a substitute for Propylene Glycol in most (but not all) applications."