In this issue of Pediatrics, Estruel and Andreyeva use a rigorous quasi-experimental study design and national birth certificate data to estimate the causal effect of the 2022 infant formula shortage on trends in breastfeeding initiation.1 Overall, they demonstrate that the national breastfeeding initiation rate increased nearly 2 percentage points after the major Abbott Nutrition plant closure and formula recall. The rate then declined again but remained modestly elevated above preshortage levels as the crisis was resolving. Notably, shortage-associated increases in breastfeeding initiation were most pronounced among subgroups with historically higher rates of formula feeding, including Medicaid recipients; non-Hispanic Black mothers; Special Supplemental Program for Women, Infants, and Children (WIC) participants; and those with lower education levels or who live in less populous settings. Consequently, preexisting disparities in breastfeeding initiation affecting these groups narrowed.