“…Marisa Stahl, an assistant professor of pediatrics at the University of Colorado School of Medicine who also was not involved in the study, agrees with that assessment. She suggests leveraging existing cohorts of infants and children 20 , 21 that provided biological samples to estimate associations between levels in stool and the incidence of food sensitivities. Because infant formula contains , comparing infants raised with and without it would be of particular interest, she adds.…”