Can babies be allergic to their own mother's milk?

I've been researching on topics about breastfeeding in preparation for my motherhood which is few months away from now. An online article discussed the probable causes of baby allergies and breastmilk is included in the list. It is not actually the breastmilk itself, but it may be something from the diet of the mother. Certain substances passed into the breastmilk may also be an underlying factor. I'll share this link for additional reference: http://tummycalm.com/is-my-baby-allergic-to-breast-milk.html However, it is still best to check with your doctor if ever there are visible allergy symptoms in your baby.