Vitamin D insufficiency is increasingly being recognized as an under-detected health risk for people of all ages in the United States. Up to 30% of U.S. children are vitamin D deficient to some degree and worldwide this is a much higher percentage. The American Academy of Pediatrics (AAP) recently published a technical report titled "UV Radiation: A Hazard to Children and Adolescents" that concluded that all "infants, children, and adolescents receive vitamin D supplementation and avoid overexposure to sunlight and artificial sources due to the health risks (cancer, etc)." Currently, studies are unclear about how much vitamin D is enough in certain populations, but the current recommendation is for at least 400 IU daily.