SkinCeuticals Antioxidant Lip Repair combines two powerhouse antioxidants, milk thistle (silymarin) and vitamin E, creating an anti-aging defense and powerful moisturizer for the lips. This antioxidant combination not only provides potection from the elements like smoke, but also against UV light which can dry out and crack the lips. Antioxidant lip repair works on a cellular level to renew the cells giving a fuller, smoother and healthier overall appearance of the lip area.