^aAll groups except Pregnancy and Lactation are males and females.

^bAs cholecalciferol. 1 µg cholecalciferol = 40 IU vitamin D.

^cAI = Adequate Intake. The experimentally determined estimate of nutrient intake by a defined group of healthy people. AI is used if the scientific evidence is not available to derive an EAR. For healthy infants fed human milk, AI is the estimated mean intake. Some seemingly healthy individuals may require higher vitamin D intakes to minimize risk of low serum 25(OH)D levels and some individuals may be at low risk on lower dietary intakes of vitamin D. The AI is believed to cover their needs, but lack of data or uncertainty in the data prevent being able to specify with confidence the percentage of individuals covered by this intake.

^d In the absence of adequate exposure to sunlight.