RDA in IU/day

AgeRDA (IU/day)Upper limit (IU/day)
Infants 6-12 months*
400
1500
Children 1-3 years old
600
2500
Children 4-8 years old
600
3000
People 9-70 years old
600
4000
People over 70 years old
800
4000
Females 14-50 years old, pregnant/lactating
600
4000