5 months can add supplemental food. Babies can start to add complementary foods when they are 4-6 months old, so it is appropriate to add complementary foods at 5 months, such as adding a small amount of rice powder containing iron, which can reduce the possibility of iron deficiency anemia. You can also add some egg yolks, crushed in small quantities, into the milk powder or rice powder. The saliva of the baby from 4 months of age has increased significantly, saliva in the enzyme amylase has begun to secrete, can digest starchy food. 5 months of age, in the addition of complementary food should pay attention to the beginning of the amount should be small, from a small amount of start to add up, and the first variety do not add too much, through the gradual way to the child to add complementary food.