Vitamin D - What Is It and How Do We Get It?
Vitamin D supplements are a fat-soluble vitamin that aids calcium absorption for healthy bones. It also helps the body maintain a strong immune defence, something which is important for anyone, especially the vulnerable. Our skin produces vitamin D when exposed to UV light, making it difficult for those living in the northern hemisphere to maintain levels during the autumn and winter months as UV light exposure is low.
Forms of Vitamin D
There are two main forms of vitamin D. These are, ergocalciferol (D2), which is the form produced by plants when exposed to UV light, and cholecalciferol (D3) the biologically active form produced in humans and animals when skin is exposed to sunlight.
Vitamin D2 and D3 Foods
Vitamin D2 and D3 are found from different food sources. Vitamin D2 is found in plants, while D3 is predominantly found in animal products.
Food Sources of D2
- Mushrooms (wild or grown under UV light)
- Fortified foods such as bread
Food Sources of D3
- Oily fish
- Egg yolk
Sources of Vitamin D Supplements
Vitamin D2 and D3 are found through numerous sources, including plants and animals. Plant sources such as mushrooms produced under UV light, make the D2 form of vitamin D. It is then extracted from the mushrooms and used for supplements or the fortification of dairy-free milks and cereals.
Most D3 cholecalciferol supplements are sourced from lanolin in sheep wool. The sheep wool undergoes an extraction process to produce cholesterol. The cholesterol can then be converted into 7-dehydrocholesterol – known as pre-vitamin D3. This product is then irradiated to produce cholecalciferol. This is the same reaction that happens in human skin when producing vitamin D from sunlight. As the lanolin is sourced from the wool of sheep it is not suitable for vegans, though is suitable for vegetarian supplements.
Can You Get a Vegan Form of Vitamin D3?
There is a vegan supplement form of D3 which is sourced from Lichen, small algae-like plants that have been exposed to UV rays. However, quantities of vitamin D3 that are extracted from the plants are much lower in comparison to lanolin sources, making it difficult to obtain in large quantities and expensive to produce. This is why most vegan vitamin D supplements use vitamin D2 vs D3, which is much cheaper to produce. At BetterYou we only use the best quality ingredients for our supplements. It is for that reason our D1000 Vegan Vitamin D and Vegan Health Oral Spray both contain the lichen source of D3 and at an affordable price.
Which Is Better For Elevating Vitamin D Status?
Vitamin D2 vs D3, which one provides a higher vitamin D status? D2 and D3 are not equal when it comes to raising vitamin D levels, as the liver metabolises them differently. Both forms of the vitamin convert into calcifediol in the liver (also known as calcidiol), however D2 yields less calcifediol than D3. This makes D2 inferior when it comes to raising blood levels. If deficient vitamin D3 has been found to be better at raising vitamin D status. One study found that vitamin D3 was twice as effective at increasing vitamin D levels than D2 supplements.
You can discover your D2 and D3 status with a simple Vitamin D at-home test kit. Our testing service will provide you with a personalised supplementation plan and a complimentary DLux Vitamin D spray to help you on your journey to optimal vitamin D levels.