Vitamin D
Prevention of Rickets and Vitamin D Deficiency in Infants, Children, and Adolescents: Summary
National Guideline Clearinghouse.
Vitamin D and Calcium: Systematic Review of Health Outcomes
DHHS. Agency for Healthcare Research and Quality.
Vitamin D: What You Need to Know About the "Sunshine" Vitamin (PDF | 257 KB)
Dairy Council of California.