Obsessed with the glow this serum gives my skin , The Medicube AGE R Glutathione Glow Serum leaves my skin looking brighter, hydrated and so smooth after every use. Perfect for that healthy glass MAKEheal Gloz Lip Serum 3 Colors Discover the New Vaseline Lip Serum Gloss for Spring So, what exactly does Glutathione do for your lips? In simple terms, it's a powerful ingredient that naturally delivers antioxidants to protect your lips from free radical damage and premature aging. So, what exactly does Glutathione do for your lips? In simple terms, it's a powerful ingredient that naturally delivers antioxidants to protect your lips from free radical damage and premature aging.