Katherine, Here are some references you can give to the nutrition teacher who says it's all baloney. All of these studies report significant protective effects against allergy when mothers avoid cow's milk during pregnancy: Lovegrove JA, et al. Dietary factors influencing levels of food antibodies and antigens in breast milk. Acta Paediatr. 1996 Jul; 85(7): 778-784. Marini A, et al. Effects of a dietary and environmental prevention programme on the incidence of allergic symptoms in high atopic risk infants: three years' follow-up. Acta Paediatr Suppl. 1996 May; 414: 1-21. Lovegrove JA, et al. The immunological and long-term atopic outcome of infants born to women following a milk-free diet during late pregnancy and lactation: a pilot study. Br J Nutr. 1994 Feb; 71(2): 223-238. Zeiger RS, et al. Effect of combined maternal and infant food-allergen avoidance on development of atopy in early infancy: a randomized study. J Allergy Clin Immunol. 1989 Jul; 84(1): 72-89. Chandra RK, et al. Influence of maternal food antigen avoidance during pregnancy and lactation on incidence of atopic eczema in infants. Clin Allergy. 1986 Nov; 16(6): 563-569 There you go! Ginna Wall, MN, IBCLC, Lactation Services Coordinator University of Washington Medical Center, Mailbox 356153 1959 NE Pacific Street, Seattle WA 98195 Voicemail: (206)548-6368, Fax: (206)548-7665