Understand the Food-Colic Connection
Is your baby excessively fussy after nursing? Dr. Sears says that some foods can be upsetting to babies as soon as two hours after you eat them. He cites cow milk products, spicy foods, and gassy foods such as broccoli, onions, cabbage, and green peppers as some foods to watch out for. He suggests nursing moms "eliminate foods that are suspect for 10 to 14 days to see if baby's symptoms disappear or diminish and challenge the results after the troublesome symptoms subside by reintroducing the suspicious food. If symptoms reappear within 24 hours, eliminate this food while breastfeeding."
Some substitutions for dairy milk could be soy, rice, oat, almond, hazelnut, or walnut milk.