June 2007 meeting

CLICK HERE for PDF
One table from the PDF

Confirmed 2011

Australia Doctor, April 2011
For those with no or minimal exposure to sunlight, Australian recommendations set an
adequate intake (AI) of 5µg a day for adults aged 19-50, (200 IU)
rising to 10µg a day for 51-70-year-olds and (400 IU)
15µg a day for those over 70. (600 IU)

An upper level (UL) has been set at 80µg a day. (3200 IU)
The higher levels for older people are because the efficiency of production via the skin declines with age.

The AI for adults (19-50 years) for Australia was based on the amount of vitamin D required to maintain serum vitamin D at a level of at least 27.5nmol/L with minimal exposure to sunlight. Exposure to sunlight would be expected to increase levels.
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See also VitaminDWiki

• Published Recommendations from around the world IU and ng - which includes the following chart