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I just came across this, and haven't double checked the info with other sources yet. But it seems that several types of mushrooms can provide vit. D, especially if they are re-exposed to sunlight...

How Vitamin D Inhibits Inflammation



More here.

Here's some info about vitamin D2 and UV-B radiation from Wikipedia:



Here's a map showing the various amounts of UV-B radiation you'll get in various countries/times of the year:...

Link: Pure Vegan D2 Spray

http://www.pure-vegan.net/_images/Vitamin_d2.jpg

Vitashine Vegan Vitamin D3 Supplements

http://www.vitashine-d3.com/vitashine_bottle_and_capsul.jpg

Link: Portobello Mushroom Powder from Dole - 'Natural Source of Vitamin D"

http://1.bp.blogspot.com/-pDIeQZh208g/Tr8SlOAC1mI/AAAAAAAAASA/W8nrvsYZg_0/s320/Mushroom+Powder.jpg

Here's an article and some tables explaining more about vit. D in mushrooms (from http://www.ars.usda.gov/):
Vitamin D in Mushrooms


Here's some info about Vitamin D in morel mushrooms:...

According to various sources, dried shiitake mushrooms, chanterelle* (and white/portobello mushrooms) may be used as vitamin D sources during the winter, where there's little vit. D generated by...

B12 *is* important for vegans... :)

Sure. Still - although there's no common agreement about an upper, safe level of vitamin D3 from supplements - max. vitamin D(3) levels is a hot topic.

Here's one of many studies on that topic. ...

Here are two articles commenting on the efficiency of D2 vs D3 in humans, and one about rat poison...

Vitamin D2 Is Much Less Effective than Vitamin D3 in Humans (2006)
Vitamin D2 Is As Effective...

Here's another comment on vitamin D in nettle:



I googled the source, and it does claim that there's vitamin D in nettle, sunshine and alfalfa - but doesn't mention where the info about nettle...

Here's a study which - not surprisingly - suggests that plants which are grown in warm climates and therefore are exposed to long sun exposure contains a lot more "vitamin D-like activity" than...

From Medicinal and aromatic plants, volume 11:

First, this book suggests that P. orientalis leafs contain between 0.15 and 120 mcg vitamin D3 per gram dry weight (Boland 1986).

It's also...

Here's a typical example of a situation where testing on animals make no sense whatsoever:
Solanum glaucophyllum as source of 1,25-dihydroxyvitamin D3.





It's of course great that these...

Here's some more vitamin D info (including some conflicting opinions):

http://www.dermnetnz.org/systemic/vitamin-d.html

...

Lots of short quotes about the importance of vitamin D here:
Vitamin D Quotes

Yet another reason to make sure you get enough sun/vitamin D:

Vitamin D May Influence Genes for Cancer, Autoimmune Disease
Findings could underscore why deficiency plays role in host of serious...

http://www.youtube.com/watch?v=5db2Fgxpom4&feature=related

About vitamin D in dandelion:

http://www.zhion.com/liver_issues/Dandelion.html

http://www.livestrong.com/article/108871-vitamins-found-dandelion-root/

...

From http://www.vitamins-supplements.org/vitamin-sources.php:




More on mushrooms and vitamin D here:

Here's a source that mentions vitamin D levels in some plants . I haven't checked this info, but here it is:




Here's som more info, suggesting that 12 flowering plants, mainly within the...

'Epidemic' of vitamin D deficiency: MUHC study

An excerpt:



The study is also referred to here:

Too little sun as bad as too much?
Scientists say vitamin D from ultraviolet rays may fight cancer

It's May, and spring in the Northern hemisphere... so, don't sit here and read about vitamin D generated from sun/daylight exposure... get out in the sun! :D

Remember, you'll get increased...

Here are some articles covering yet another potential reason to get out in the sun: you'll feel better!

Vitamin D and Depression




http://www.webmd.com/depression/guide/diet-recovery?page=2

The sun is normally considered being considered the most important source of vitamin D for both vegan and non-vegans...

Sunbathing 'could boost your intellect and prevent dementia'

Sure, but if one would take eg. ten times more of a kind of vit D (D2) that required ten times more to get the same affect as a 'standard' amount of another kind of vit. D (D3), don't you think that...

That's what I meant. It was a comment to the relevance of whether it had any significance at all if one needed a few micrograms extra of one of the types of vit D.

Yes, sun lamps are known to boost vit. D levels.


That depends on where you live....


The part of a vit. D pill that actually consist of the actual vitamin is microscopic, so even you would...

So - you consider continue being a vegan with the possible exception that you will supplement with D3 in the darkest months (minus the period where the vit. D reserves in the body is being utilized)?...

Prenatal vitamin D linked to kids' dental health
An excerpt from the article:


More here.

D2 is derived from plants, D3 is not. (The vitamin that comes from sunlight exposure is D3).

Both Vitamin D Forms D2 And D3 Work Equally Well
Vitamin D3 more potent than D2, further evidence...

Vitamin D Insufficiency Linked to Parkinson’s Disease

Sunbathing 'slows ageing process'



More here.

Vitamin D: A Gene-Regulating Super Nutrient

BBC / Science & Nature:
Can tomatoes protect your skin?

Teens Should Increase Vitamin D Intake by 1000 Percent to Avoid Deficiency, Say Researchers

Here's some more info about vitamin D, plants and sunlight:

From...