<Tr> <Td> Infants 0--6 months </Td> <Td> 400 * </Td> </Tr> <Tr> <Td> Infants 6--12 months </Td> <Td> 400 * </Td> </Tr> <Tr> <Td> 1--70 years </Td> <Td> 600 (15 μg / day) </Td> </Tr> <Tr> <Td> 71 + years </Td> <Td> 800 (20 μg / day) </Td> </Tr>

Mechanism of action of vit d on intestinal mucosa