Similac Alimentum infant formula with 2 -FL HMO is the first and only hypoallergenic infant formula with 2 -FL HMO a unique immune-nourishing ingredient. It starts reducing colic symptoms due to protein sensitivity in most babies within 24 hours † so your baby can start feeling better today.†* Due to protein sensitivity.† Based on a clinical study with Alimentum Ready to Feed without DHA ARA 2 -FL HMO lutein and beta-carotene. A crossover clinical study of infants experiencing colic symptoms due to cow’s milk protein sensitivity showed 5 of 6 infants initiated on Alimentum during the first week achieved a reduction in excessive crying. Data on File Study AC84 August 2004. Abbott Nutrition Columbus Ohio.