The best time for infants to eat egg yolk depends on their appetite and digestive ability, and can generally be added starting around 7-8 months after birth. If you have allergies, you may need to add them later. When adding egg yolks, it is important to add them gradually from small amounts to large amounts and not to feed too much at once. Usually, babies can gradually add complementary foods from 5-6 months of age, starting with rice flour and gradually adding mashed vegetables, meat and egg yolk. Because egg yolk is less likely to be allergic than egg white, and because egg yolk contains lecithin, protein and rich iron, it has high nutritional value and is more suitable for children of that age. Egg yolk should be added gradually from little to much, usually when the baby’s digestive function is normal and the stool is normal, and it can be mashed into rice flour.