Enfamil A.R.—clinically proven to reduce spit up by over 40%, while still providing the complete nutrition your baby needs to reach key milestones. Clinically proven* to reduce spit-up by over 40%.. Nutritionally balanced, unlike adding rice cereal to formula. Provides complete nutrition for your baby's first year. Formula for spit-up defined as rice-thickened formula. Based on a clinical study of Enfamil A.R. infant formula before the addition of DHA, ARA and prebiotics with infants who spit up frequently (5 or more spit-ups per day), comparing frequency and volume of spit-up after feeding Enfamil A.R. to the same babies at the beginning of the study.