Most people believe that sun exposure causes cancer. Nothing
could be further from the truth. As this study published
in the prestigious "Cancer" journal indicates, exposure to
sun actually decreases cancer rates.
Does this mean that one's sun exposure does not contribute
to skin cancer? Absolutely not.
However, skin cancers are more likely related to the large
distortion most people have in their omega-6 to omega-3 fat
ratio. The high excess of omega-6 fats in most people's diet
puts them at a much higher risk of developing skin cancer
when exposed to excess sun, which would, of course, provide them with more Vitamin D.
So the solution is not to slather sun block on. Sun block
can be quite toxic and should be avoided by most people.
The sensible approach would be to limit sun exposure so you
never get sun burned.
It is sunburn in conjunction with excess omega-6 fats that
increases your risk of skin cancer.
But even with the potential increase in skin cancer, most
skin cancers are relatively benign when compared with breast,
colon, and prostate cancers that lack of sun exposure is
So you can't have it both ways. Avoid the sun and don't
change your diet and you will lower your risk of skin cancer,
but increase your risk of far more common and deadlier cancers.
So why not change the fat content of your diet and use sensible
sun exposure guidelines and reap the benefits of sunlight?
It is also important to note that many researchers are currently
evaluating vitamin D and its analogs in the treatment of
cancer (van den Bemd GJ, Chang GT. Vitamin D and vitamin
D analogs in cancer treatment. Curr Drug Targets. 2002 Feb;3(1):85-94.)
Vitamin D can no longer properly be considered a vitamin, which, by definition is something that comes from outside the body. As Vitamin D can be made inside the body, some argue that it is not a true vitamin.
Nevertheless, vitamin D resembles true vitamins inasmuch
as humans -- who are cut off from the critical solar ultraviolet
wavelengths by reason of latitude, clothing, or shelter --
depend on an external source of the substance, just as they
do for the true essential nutrients.
The major biologic function of vitamin D is to maintain
normal blood levels of calcium and phosphorus. Vitamin D
aids in the absorption of calcium, helping to form and maintain
strong bones. It promotes bone mineralization in concert
with a number of other vitamins, minerals, and hormones.
However, it is quite clear that vitamin D does far more
than promote optimized bone health. In addition to the strong
evidence provided in the above article about prevention of cancer
vitamin D has also been associated with improvement in the
Infertility and PMS
Fatigue, Depression and Seasonal Affective Disorder
Some key points to remember. The vitamin D in milk, and that
put in most vitamins is vitamin D2 and is synthetic. Vitamin
D2 is also called ergocalciferol. It is not the vitamin D
that you want to supplement with. It is not nearly as good
as the vitamin D obtained from sunlight or natural food sources
like cod liver oil which is called vitamin D3 or calciferol.
The best place to get vitamin D is from UV-B from sunlight.
However, darker skinned people require 10 to 20 times the
sun exposure length than lighter skinned people do to build
up the same amount of vitamin D.
That is one of the major reasons why African Americans have
a much higher rate of cancer in North America than other
Most people, who have skin that is deeply pigmented, should
take extra precautions when living in North America for health
reasons. The only work-around for them to maintain their
health would be to optimize their vitamin D levels by supplementation.
It is also very important to realize that the RDA of vitamin
D of 400 units is absolutely inadequate for most people who
do not have exposure to regular sunshine. Most people may
need up to 10,000 units per day for a short time to build
their vitamin D levels up to healthy ranges.
from vitamin d to vitamins
Essential fatty acids