After the baby is 6 months, the iron element content in the body is basically consumed. If the iron content in the supplementary food is also lacking, it is easy to cause iron deficiency anemia, resulting in chronic hypoxia, which is not conducive to the development of the nervous system.
Since then, the amount of food eaten by breast-fed babies has increased, and the mother's milk has decreased a little bit. so pure breast-feeding has been unable to meet the baby's physical needs. 6-12 months is the key period when baby learn and exercise chewing and autonomous swallowing, so 6-7 months is the best stage to add right complementary food.