Protein: Essential for growth and repair of tissues. The RDA varies from about 13 grams per day for toddlers to 46 grams per day for teenage girls and 52 grams for teenage boys. Calcium: Critical for bone development. The RDA ranges from 700 mg for toddlers to 1,300 mg for adolescents. Iron: Important for blood formation and cognitive development. The RDA varies from 7 mg for toddlers to 15 mg for teenage girls. Vitamin D: Needed for calcium absorption and bone health. The RDA is 600 IU for children aged 1-18 years. Fiber: Important for digestive health. The RDA ranges from 19 grams for toddlers to 26 grams for teenage girls and 31 grams for teenage boys.
