After the "problematic powdered milk" incident, many parents, being worried about the quality of the products, have chosen to substitute the formula with soy milk or soya bean milk as the main supplementary food besides mother's milk. However, Director Chen Limin, pediatrician in the Third Affiliated Hospital of Guangzhou Medical College reminded that soy milk and soya bean milk are not the best food to promote the brain development during the infancy; breast milk or formula containing high level of DHA is the ideal food to meet the needs of baby's brain development.