• Based on strong research evidence, all infants should receive 400 IU/day of vitamin D beginning in the first few days of age to prevent vitamin D deficiency and rickets. • Based on strong research evidence, children and adolescents age >1 year may require as much as 600IU/day of vitamin D. • Based on strong research evidence, all newborns should receive 1 mg of vitamin K at birth to prevent vitamin K deficiency bleeding. • Based on strong research evidence, preconceptional and pregnant women should be supplemented with folate to decrease the likelihood of neural tube defects.