What's in an RXBAR? RXBARs contain a handful of core ingredients; egg whites for protein, nuts for texture, dates to bind and everything else for taste. Find full nutrition and ingredient information on each product's page here. Shop RXBARs here. Related articles What is the protein content in RXBAR products? Are RXBAR products compliant with the Whole30® program rules? What is an RXBAR? Why is my RXBAR lighter in color? What makes RX A.M. Oats different?