Murad's Environmental Shield Rapid Dark Age Spot Correcting Serum is a highly effective treatment for those looking to combat the visible signs of ageing. This 30ml bottle of serum is part of the Environmental Shield VITA-C Glycolic Brightening product line and is designed to be used both day and night to achieve the best results. The serum is formulated with a number of active ingredients, including Glycolic Acid and Glycerin, which work together to brighten the skin and correct dark spots. The product is also animal cruelty-free and has a Period After Opening (PAO) of 12 months. With regular use, this spot correcting serum can help to improve the overall appearance of the skin, leaving it looking youthful and radiant.