Vitamin D is necessary for optimal bone and muscle function. It helps absorption of calcium from the intestine and also acts in strengthening the bone. Vitamin D also contributes to muscle strength. Deficiency of vitamin D can affect the bone health and could cause fractures in the elderly. Surprising, vitamin D deficiency is not uncommon in Australia. About one third of Australians have vitamin D deficiency.
Summer |
Winter |
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Moderately fair skin |
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How long? |
5-10 minutes, most days |
7-30 minutes (depending on latitude), most days |
Body area exposed? |
Arms exposed (or equivalent) |
Arms exposed (or equivalent) |
When? |
At mid morning or at mid afternoon (at 10am or at 2pm standard time ie: 11am or 3pm daylight saving). Avoid peak UV times |
Midday |
Darker skin |
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How long? |
15-60 minutes, most days |
20min – 3hrs** (depending on latitude), most days |
Body area exposed? |
Arms exposed (or equivalent) |
Arms exposed (or equivalent) |
When? |
At mid morning or at mid afternoon (at 10 am or at 2pm standard time ie: 11am or 3pm daylight saving). Avoid peak UV times |
Midday |