Plain, unsweetened, pasteurized yogurt is a nutrient rich first food for many babies, full of calcium, protein and magnesium. Choose yogurt labeled “live or active cultures”. Lactic acid kills harmful bacteria that can cause inflammation and illness. Getting your baby to develop a taste for low-fat dairy will serve them well once they reach adolescence. Mashing fruits or cooked veggies with yogurt is a great way to introduce new ingredients to your baby. Foods should be introduced individually to monitor any dietary or allergic reactions.