Xylose- Form of sugar. Similar to other sugars, xylose has hydrating properties for skin.
Xymenynic Acid- Synthetic fatty acid that functions as a skin-softening agent.
Ximenia Americana Oil- Latin name for plum oil; it can have emollient properties.
Xanthan Gum- Used as a thickening agent.
Xanthophyll- Also known as lutein, this is a cartenoid pigment from plants that functions as an antioxidant.