Cancer, Vitamin D, Sunlight

Well here is a quandary.
In the last entry I talked about Vitamin D.
And now they are studying the link between sunlight causing or maybe preventing certain cancers and diseases.
Of course radiation causes cancer, but it can also be used to treat cancer.

"Since vitamin D has been shown to play a protective role in a number of internal cancers and possibly a range of other diseases, it is important to study the relative risks to determine whether advice to avoid sun exposure may be causing more harm than good in some populations," Setlow warned.
http://www.guardian.co.uk/science/2009/feb/08/vitamin-d-sun-health

And here's another article:
Doesn't sunlight cause cancer?
Yes, long-term exposure to ultraviolet radiation from the sun (UVA and UVB) has been shown to increase the risk of skin cancer. This is why it is recommended that we wear sunscreen and sun-protective clothing during the summer months.

How can sunlight also protect against cancer?
The answer lies in a vitamin that may play a role in controlling the production of cells - vitamin D. Vitamin D is manfactured in the skin when it is exposed to sunlight and it is this vitamin that may have a protective effect against certain cancers by preventing the overproduction of cells.
http://www.bupa.co.uk/health_information/html/health_news/261103vitd.html

Vitamin D and Cancer

And here's another little cancer preventive that's cheap and easy to do.
It seems more and more simple things are being brought to light.

Researchers have found that low levels may be associated with osteomalacia and osteoporosis, and have been linked to increased risks of developing heart disease, hypertension, some autoimmune diseases (including type 1 diabetes, multiple sclerosis and rheumatoid arthritis) and several types of cancer. In December, a study reported in the Journal of Clinical Endocrinology & Metabolism said that vitamin D deficiencies can cause weight gain and stunt growth in girls during puberty -- a peak time of growth.
http://www.fredericknewspost.com/sections/art_life/display.htm?storyID=85951

It sounds too good to be true ? a little inexpensive pill that could block the development of some cancers, strengthen bones, prevent multiple sclerosis and alleviate winter depression.
http://www.news-medical.net/?id=34992

This web site is dedicated to vitamin D and cancer. This is because exciting new research indicates that vitamin D—whether produced in the skin as a result of exposure to ultraviolet radiation (from sunlight or sun lamps) or obtained from supplementation with cholecalciferol (vitamin D3)—may help cancer patients. However, the research is far from complete.
http://www.vitamindcouncil.org/cancerMain.shtml

So what are some sources of Vitamin D?
Sunlight
Fish liver oils
Herring
Catfish
Salmon
Mackerel
Sardines
Tuna
Eel
Eggs
Beef liver
And of course Milk, but a lot of people have problems with milk.
So suppliments might be a good idea.