Sign up now for a free sample of Enfamil A.R. Lipil, for more spit up free feedings. Enfamil A.R. is specially formulated with an easy-to-digest rice starch that goes down smooth, and is designed to thicken in your baby’s stomach. After switching to Enfamil A.R., babies had approximately 4x more spit up-free feedings.* And with all the benefits of LIPIL for baby’s brain and eye development.