According to Healthline, propylene glycol is a syrupy liquid that’s thicker than water. It is odorless, colorless, and sometimes utilized in meals and drinks so as to add a bit oomph of taste or as a preservative. It was initially derived from petroleum merchandise through the use of fossil fuels, which is not nice for the setting, however now they’ll make artificial propylene glycol from sugar cane, vegetable oils, and corn, per Mind Body Green.
This model of propylene glycol is certainly the best way to go. Clean beauty chemist Krupa Koestline informed the outlet, “It has all the good properties of its petroleum-derived cousin, in addition to preservative-boosting capabilities which might be nice in any formulation.” This clear liquid is used as a solvent and can be an important humectant. Propylene glycol, specifically made for skincare merchandise, is utilized in lotions and serums (through Byrdie). However, the one derived from petroleum just isn’t.
https://www.thelist.com/823059/why-this-previously-banished-skincare-ingredient-is-making-a-comeback/