Brand new never opened! I am nursing and cannot use. *two available* Formulated with vitamin C, retinol, and acerola cherry extract, this lightweight serum from StriVectin helps to visibly brighten complexion. How do I use it: Shake well. Apply one to three drops to clean face in the morning and evening. Follow with moisturizer. From StriVectin. Includes: 1-fl oz Super-C Retinol Brighten & Correct Vitamin C Serum