CHO CD EfficientFeed Kit assists researchers in rapidly identifying the optimum feed regimen for any fed-batch CHO based cell culture. The kit comes with two feed supplements, one liter each of CHO CD EfficientFeed A and CHO CD EfficientFeed B, and a detailed manual. The manual guides users through decisions relating to chemical or physical compatibility, and the right feeds to use in shake flasks and bench-top bioreactors, as well as suggesting when additional support might be appropriate. The kit is based on GIBCO chemically defined, serum-free CHO media that can be used to increase productivity by up to five times when compared to batch conditions.