Vitamin D
What is Vitamin D?
Vitamin D is a fat-soluble vitamin that has an important role in maintaining strong bones.
What are the benefits of Vitamin D?
Vitamin D is required for better calcium absorption in the stomach and intestine. It also controls the levels of calcium and phosphorus in our body so that these minerals are deposited into or demineralised from our bones.
Where can I get Vitamin D?
Vitamin D is also known as “Sun Vitamin” as our skin is able to make Vitamin D using the solar ultraviolet light. According to the Medical Journal of Australia* a significant number of Australian's are deficient in Vitamin D – it is a fallacy that Australian’s receive adequate Vitamin D from casual exposure to sunlight.
Vitamin D can be found in only a few foods; rich sources are fatty fish such as salmon, sardines, herring and mackerel. Other sources include eggs and fortified products such as milk, margarine and butter.
How much Vitamin D do I need?
The Medical Journal of Australia* states the levels of Vitamin D required to prevent deficiency are, at least 200 IU (5g) (age < 50 years) or 600 IU (15 g) (age >70 years) per day.
* Source MJA 2005; 182 (6):281-285
Dietary Sources of Vitamin D
| Food |
Vitamin D (ug) |
| Kraft Singles, 1 slice |
0.84 |
| Milk, fortified, 1 glass, 200ml |
1 |
| Margarine, fortified, 1 teaspoon |
2 |
| Salmon, 100g |
9 |
| Sardines, canned in oil, 100g |
6 |
| Mackerel, 100g |
9 |
| Egg yolk, 1 piece |
0.5 |
Are there any dangers with having too much Vitamin D through eating lots of products containing Vitamin D?
Every food should be consumed in moderation and in the context of a balanced diet. The Dietary Guidelines for Australia* recommends 2-3 serves of dairy foods a day for most people. At certain times in life calcium needs increase for example during pregnancy, breastfeeding and teenage years. A serve is 250ml of low fat milk, 2 slices of cheese, 200g carton of yoghurt or 250ml custard.
* Dietitians Association of Australia www.daa.asn.au