三、 Macronutrients Function Food sources Requirement >Protein is a constituent of Breast feeding all body tissues. There is a Milk production,2a/ka/d requirement for growth and egg, fish, meat, cow milk for maintenance bean etc Protein feeding 3. 5g/kg/d >In infant and children Animal protein Plant protein optimal growth depends on is better than an adequate dietary protein plant protein Feeding 4g/kg/d supply Nine essential amino acids: histidine, isoleucine leucine lysine methionine, phenylalanine, threonine, tryptophan, and valine Conditional essential amino acids: cystine taurine arginin二、Macronutrients Function Food sources Requirement Protein ➢Protein is a constituent of all body tissues. There is a requirement for growth and for maintenance. ➢In infant and children, optimal growth depends on an adequate dietary protein supply Milk production, egg, fish, meat, bean etc. Animal protein is better than plant protein ➢ Breast feeding 2g/kg/d ➢ cow milk feeding 3.5g/kg/d ➢ Plant protein Feeding 4g/kg/d Nine essential amino acids: histidine，isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine Conditional essential amino acids: cystine, taurine, arginine