Är sola i solarium egentligen farligt?
WHO fastlår nu att sola i solarium är farligt. Men, det finns studier som visar att en god hög halt av D-vitamin skyddar mot cancer. När man räknat på hur många nya hudcancerfall som solande ger, har man kontrollerat för om det är en minskad incidens av andra typer av cancer?
För att plocka text ur en tidigare bloggpost vad gäller solande:
Toronto Globe and Mail skriver att det kan vara så att hudcancer är statistiskt sett ett litet pris att betala för de fördelar en hög D-vitaminproduktion kan ge, se det fetstilade i citatet nedan:
Those studying the vitamin say the hide-from-sunlight advice has amounted to the health equivalent of a foolish poker trade. Anyone practising sun avoidance has traded the benefit of a reduced risk of skin cancer — which is easy to detect and treat and seldom fatal — for an increased risk of the scary, high-body-count cancers, such as breast, prostate and colon, that appear linked to vitamin D shortages.
The sun advice has been misguided information "of just breathtaking proportions," said John Cannell, head of the Vitamin D Council, a non-profit, California-based organization.
"Fifteen hundred Americans die every year from [skin cancers]. Fifteen hundred Americans die every day from the serious cancers."
Health Canada denies its advice might be dangerous. In an e-mailed statement, it said that most people don't apply sunscreen thoroughly, leaving some skin exposed, and that people spend enough time outside without skin protection to make adequate amounts of vitamin D.
However, the Canadian Cancer Society last year quietly tweaked its recommendation to recognize that limited amounts of sun exposure are essential for vitamin D levels.
Och om man vill ha i sig mat med mycket vitamin D, finns en bra lista här.
jag har tidigare bloggat om Vitamin D och artikeln, här.
En kommentar från Slashdot:
http://science.slashdot.org/comments.pl?sid=232675&cid=18920141
The revolution in Vitamin D research came with the discovery that D is "activated" (25OH-D3 turns into 1,25OH-D3) in a variety of different tissues of the body, not just the kidneys.Which body tissues do we know can "activate" Vitamin D3? Here's some: prostate tissue, colon tissue, breast tissue. Where are some popular places that cancer likes to form? Same list. Hmmm.
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There is a simple hypothesis (far from proved, but I'll bet my pill taking regimen on it for now) that explains this: local tissue conversion of 25OH-D3 to 1,25OH-D3 shuts down as soon as serum levels of 25OH-D3 start to decline, and doesn't start up again until serum levels stabilize.
If this hypothesis is true, then allowing your vitamin D3 serum levels to drop during the winter may be as bad for you as just having low levels of vitamin D3 all year round.
Nu kanman få i sig vitamin på andra sätt äm via strålning, och det är tydligen minst 400 IE vitamin D3 man ska ha i dieten, se denna bloggpost.
Risken för malignt melanom, den farligaste formen av hudcancer, ökar med 75 procent för den som börjar sola i solarium före 30 års ålder, enligt studien som presenteras i den brittiska medicintidskriften The Lancet Oncology.