Most children outgrow CMPA at 3 years
45 to 50% of children outgrow CMPA at 1 year, 60 to 75% at 2 years and 85 to 90% at 3 years.
Source: Koletzko S et al. Diagnostic approach and management of cow's-milk protein allergy in infants and children: ESPGHAN GI Committee practical guidelines. J Pediatr Gastroenterol Nutr. 2012;55(2):221-9.