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Vitamin D in Australia: evidence and prices
TL;DR
Vitamin D comes mostly from sun exposure, plus some foods and supplements. healthdirect says low vitamin D is found with a blood test and to check with your doctor about the correct dose before taking supplements. The Australian/NZ adult upper limit is 80 mcg (3,200 IU) per day.
What official sources say
healthdirect says vitamin D deficiency can be found with a blood test, your doctor may recommend supplements if your level is low, and you should check with your doctor about the correct dose before taking vitamin D supplements. Some people should not take them. [1]
Upper limit
The Australian/NZ Nutrient Reference Values (NHMRC) set an adult upper limit of 80 mcg (3,200 IU) per day. (The US value is higher, at 4,000 IU.) Many products and combinations (multivitamins, D3+K2, cod liver oil) add up, so total your labels. [2] [3]
Prices in Australia
Price check pending. We couldn't verify current Australian retailer prices yet, so none are shown.
FAQ
Do I need a vitamin D test before supplementing?
healthdirect advises checking with your doctor about dose before taking vitamin D supplements, and says deficiency is found with a blood test.
Is D3 better than D2?
NIH ODS discusses both forms. Ask your pharmacist which suits you.
Sources
- healthdirect: Vitamin D
- NHMRC Nutrient Reference Values for Australia and New Zealand: Vitamin D (Eat For Health)
- NIH ODS: Vitamin D fact sheet
Sources checked 15 Oct 2026. Pending human review before publication.