Nutramigen with DHA and ARA Ready-to-Use Liquid, 640 calories per 32 fluid ounce bottle, lactose-free. Nutramigen is an iron-fortified, hypoallergenic infant formula designed for infants who are allergic to the intact proteins in cows milk and soy formulas. Nutramigen has extensively hydrolyzed protein and is proven effective for managing colic due to cow's milk allergy.