Starter Infant Formula for Colic, Gas, and Constipation Fortified with IronNAN Comfort 1 is a starter infant formula designed for infants from birth to 6 months. It is intended for the dietary management of minor digestive problems infantile colic, gas, flatulence, abdominal cramps, constipation.L.reuteri is a healthy probiotic culture which helps support baby's digestion, reduces excessive crying in colicky babies and contributes to the development of a healthy gut.Highlights: Starter Infant Formula for Colic, Gas, and Constipation Fortified with IronNAN Comfort 1 is a starter infant formula designed for infants from birth to 6 months. It is intended for the dietary management of minor digestive problems infantile colic, gas, flatulence, abdominal cramps, constipation.L.reuteri is a healthy probiotic culture which helps support baby's digestion, reduces excessive crying in colicky babies and contributes to the development of a healthy gut.