. . . . . . "???One of the most critical aspects of feeding youngsters is to ensure they???re getting enough good quality protein, vitamins and minerals,??? says Louise Jones of Dodson & Horrell. ???Protein???s needed for growth, muscle and cell development, while vitamins and minerals such as copper and calcium are important for cartilage and bone.??? A youngster???s requirements for these trace elements in t" . . . . .