Adequate vitamin D is needed for:
1. Absorption of calcium from the gastrointestinal tract
2. Regulation of serum calcium levels
3. Regulation of serum phosphate levels
4. All of the above
Question 2
Newborns are at risk for early vitamin K deficiency bleeding and the American Academy of Pediatrics recommends that all newborns receive:
1. IM vitamin K (phytonadione) within 24 hours of birth
2. Oral vitamin K supplementation in the first 3 weeks of life
3. Formula containing vitamin K or breast milk
4. Oral vitamin K in the first 24 hours after birth