Why is my RXBAR lighter in color? Our bars appear lighter when they're freshest. RXBARs are made with real ingredients, so throughout the shelf life the color may change. See also: What is the shelf life of RXBARs? Related articles What is the shelf life of RXBARs? What does No B.S. stand for? What is the protein content in RXBARs? Are RXBARs compliant with the Whole30® program rules? Are RXBARs keto-friendly?