Bio-Butylene glycol is a multi-tasking colourless, syrupy liquid. It’s a great pick for creating a nice feeling product. Used to be produced synthetically but now also plant-derived. We, of course, have the plant-derived version of this in our Everyday Day Cream and Everyday Glow Serum. Butylene glycol main job is usually to be a solvent for the other ingredients. Other tasks include helping the product to absorb faster and deeper into the skin (penetration enhancer), making the product spread nicely over the skin (slip agent), and attracting water (humectant) into the skin. In summary: The Butylene glycol  you find in our product is Cosmos and Ecocert certified. And learn more about it on our journal here.  Found in: Everyday Day Cream, Everyday Glow Serum.