University of Texas at Austin Nov 21 2025 Swapping beef for a plant-based meat substitute changed breast milk composition in just six days - even when the rest of the diet was made up of whole, unprocessed foods - according to a first-of-its-kind study from researchers at The University of Texas at Austin.  The findings, published in the American Journal of Clinical Nutrition , reveal that even small shifts in a breastfeeding family's diet can quickly alter the types of fats their infant