Enfamil Nutramigen is a hypoallergenic formula proven to manage colic fast, often within 48 hours. If your baby has an allergy to the cow's milk protein in infant formula, Nutramigen contains both extensively hydrolyzed protein to manage colic fast. These two ingredients offer a more comprehensive approach working together to help babies feel better faster. The benefits of these two ingredients include: Hypoallergenic, easy-to-digest proteins, proven to promote skin health in infants through 18 months of age, proven to promote digestive system health within 1 week of use, effectively manages colic in 48 hours, promotes immune system balance.†Studied before the addition of DHA and ARA.*Enfamil is the #1 pediatrician recommended brand of Infant Formula - QuintilesIMS, using the ProVoice Survey fielded from October 1, 2016 to September 30, 2017.