Adequate nutrition is crucial for normal child growth and it is important, yet challenging, to define the best nutrition for healthy and active children as well as for those who suffer from acute or chronic disease, considering the varying needs of different age groups. As in past issues, in the present volume of the Nutrition and Growth Yearbook, leading international specialists in nutrition and growth have selected the most interesting studies from peer-reviewed journals published between July 2020 and June 2021, and offer their comments on these manuscripts. This publication provides a significant contribution to the interaction between nutrition and growth as a major issue for growing children, their parents, and the medical teams taking care of them throughout the neonatal period, infancy, childhood, and adolescence.