IL10 and allergic disease: IL10 concentration in breast milk is higher at 3 months postpartum among mothers who report allergies.20 Variable levels of IL10 in breast milk have been implicated in disparate neonatal outcomes, including immeasurable IL10 in milk fed to infants who developed NEC21 and higher milk levels associated with neonatal jaundice.22 IL10 is influenced by SNPs in the gene's promoter region23-26; however, the effect of SNPs on milk IL10 levels has never been examined.