Fritt Helsevalg har skrevet mye om vitamin D – solas gratisvitamin – og helse, ikke minst når det gjelder kreft og kreftprevensjon. Søk på våre nettsider, så finner du mye stoff. Den 21. oktober skrev den engelske avisen The Independent en liten sak under tittelen "Sunlight cuts risk of many cancers", som henviser til ytterligere to nye studier. Hallo, Brustad, hvor er du?  Og Kreftforeningen: Nå må dere kreve gratis D-vitamintilskudd til alle nordmenn – i hvert fall i vinterhalvåret. Om sommeren er soling bra for helsa, og gir tilstrekkelig med D. Om vinteren får vi nordmenn lite eller ingen vitamin D fra sola. Tilskudd er nødvendig; tran er ikke nok. Vitamin D3 fås på helsekosten.

Sunlight cuts risk of many cancers

By Roger Dobson

Published: 21 October 2007

Kilde: http://news.independent.co.uk/health/article3081843.ece

Sunbathing, considered risky by skin cancer experts, may actually reduce the risk of breast and other cancers, new research has found.

Some women who had higher sun exposure had their risk of advanced breast cancer reduced by almost half, according to the scientific study.

The researchers from Stanford University, who report their findings in the American Journal of Epidemiology this week, said: "This study supports the idea that sunlight exposure reduces risk of advanced breast cancer among women with light skin pigmentation.''

The Stanford cancer specialists measured 4,000 women aged 35 to 79, half of them diagnosed with breast cancer, for the effects of long-term sun exposure.

Sun exposure may also protect against a number of other cancers, according to a second research team who studied more than four million people in 11 countries, including 416,000 who had been diagnosed with skin cancer.

These results, reported in the European Journal of Cancer, show that the risk of internal cancers after skin cancers was lower among people living in sunny countries.

The researchers said: "Vitamin D production in the skin seems to decrease the risk of several solid cancers, especially stomach, colo-rectal, liver and gall- bladder, pancreas, lung, female breast, prostate, bladder and kidney cancers."

Sunlight plays a vital role in the production of beneficial vitamin D in the body. Although food provides some vitamin D, up to 90 per cent comes from exposure to sunlight.

Notater/linker:

The American Journal of Epidemiology can be found in many ways on the net, but with no libnk directly to the referenced article.

European Journal of Cancer (Volume 43 (2007))

Link: http://intl.elsevierhealth.com/journals/ejca/

Link to abstract:

http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6T68-4PC90G4-2&_user=10&_coverDate=11%2F30%2F2007&_rdoc=14&_fmt=summary&_orig=browse&_srch=doc-info(%23toc%235024%232007%23999569983%23672102%23FLA%23display%23Volume)&_cdi=5024&_sort=d&_docanchor=&_ct=20&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=78e3f6c0b9f27e504d0162ffe8fb328a

Sun exposure and non-Hodgkin lymphoma: A population-based, case–control study

Lori K. Sonia, Lifang Houa, Susan M. Gapstura, b, Andrew M. Evensb, c, Dennis D. Weisenburgerd and Brian C.-H. Chiua, b, , 

-.Department of Preventive Medicine, Northwestern University Medical School, Chicago, IL, United States

- The Robert H. Lurie Comprehensive Cancer Center, Northwestern University, Chicago, IL, United States

- Division of Hematology/Oncology Lymphoma Program, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, United States

- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE, United States

Received 25 April 2007;  revised 26 June 2007;  accepted 27 June 2007.  Available online 7 August 2007.

Abstract

To investigate the association between sun exposure and risk of non-Hodgkin lymphoma (NHL) by histologic subtypes and to explore whether or not vitamin D intake modify sun–NHL association, we analysed data from a population-based, case–control study conducted in Nebraska between 1999 and 2002. Information on sun exposure during the spring, summer, fall and winter was collected from 387 cases and 535 controls by telephone interview. We found no association between seasonal sun exposure and risk of NHL. Vitamin D intake was also not associated with NHL risk, nor does it modify the sun–NHL association. In contrast, total hours of sun exposure was inversely associated with the risk of NHL (odds ratio (OR) = 0.7 comparing >30 h/week to <14 h/week, 95% confidence interval (CI) = 0.5–1.1). Sun exposure was associated with a lower risk of NHL among farmers (OR = 0.8, 0.5–1.3 for 14–30 h/week; OR = 0.6, 0.3–0.9 for >30 h/week; p-trend = 0.02), but not among non-farmers. Total hours of sun exposure was also inversely associated with risk of diffuse large B-cell lymphoma and T-cell lymphoma. In conclusion, our data suggest that total hours of sun exposure is associated with a lower risk of NHL, and the inverse association is not modified by vitamin D intake, is stronger among farmer, and may vary by subtypes.

Corresponding author: Address: Department of Preventive Medicine, Feinberg School of Medicine, Northwestern University, 680 North Lake Shore Drive, Suite 1102, Chicago, IL 60611-4402, United States. Tel.: +1 312 503 4672; fax: +1 312 908 9588.

European Journal of Cancer