Answer to Question 1
Except for vitamin D, the needs increase drastically at the onset of adolescence. Girls need more iron than do boys. Vitamins D, C, and B12, calcium, phosphorus, and iodine are the same for both sexes. The remaining nutrients are increased more for boys than girls.
Answer to Question 2
Dietary guidelines recommend that the total intake should not exceed 30 of the day's total energy intake, and that for children and adolescents 4 to 18 years of age, between 25 to 35 of calories should be from fat. Deficiency symptoms occur with fat intakes below 10 of total daily calories.