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Less UV means 2X more Breast Cancer – June 2011

Ultraviolet Sunlight Exposure During Adolescence and Adulthood and Breast Cancer Risk: Population-based Case-Control Study Among Ontario Women.

Am J Epidemiol. 2011 Jun 9.
Anderson LN, Cotterchio M, Kirsh VA, Knight JA.

Recent studies suggest that vitamin D may be associated with reduced breast cancer risk, but most studies have evaluated only dietary vitamin D intake. The associations among ultraviolet radiation from sunlight, factors related to cutaneous vitamin D production, and breast cancer risk were evaluated in a population-based case-control study conducted in Ontario, Canada, between 2003 and 2004 (n = 3,101 cases and n = 3,471 controls).

Time spent outdoors was associated with reduced breast cancer risk during 4 periods of life (>21 vs. ?6 hours/week age-adjusted odds ratio

  • (OR) = 0.71, 95% confidence interval (CI): 0.60, 0.85 in the teenage years;
  • OR = 0.64, 95% CI: 0.53, 0.76 in the 20s-30s;
  • OR = 0.74, 95% CI: 0.61, 0.88 in the 40s-50s; and
  • OR = 0.50, 95% CI: 0.37, 0.66 in the 60s-74 years).

Sun protection practices and ultraviolet radiation were not associated with breast cancer risk. A combined solar vitamin D score, including all the variables related to vitamin D production, was significantly associated with reduced breast cancer risk. These associations were not confounded or modified by menopausal status, dietary vitamin D intake, or physical activity. This study suggests that factors suggestive of increased cutaneous production of vitamin D are associated with reduced breast cancer risk.


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XX+ VitaminDWiki UV pages have CANCER in the title

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Items found: 30
Title Modified
Less UV means 2X more Breast Cancer – June 2011 07 Jan, 2025
23 Cancers in the US are associated with low UVB - Grant April 2024 17 May, 2024
Vitamin D from the sun reduces the risk of internal cancers, but increases some skin cancers – Nov 2021 05 Feb, 2023
Gastric Cancer, Vitamin D, VDR, UV - many studies 10 Nov, 2022
Most sunscreens actually increase the growth of skin cancer - May 2010 26 Apr, 2021
Some cancer rates are reduced when live at high altitude, but other cancers increase after a few generations – March 2021 27 Mar, 2021
Book: Sunlight, UV, Vitamin D and Receptor, Skin and other Cancers - Dec 2020 09 Dec, 2020
Breast Cancer risk reduced 17 percent by 1 hour of daily summer sun – meta-analysis Jan 2020 07 Jan, 2020
Brain cancer in 175 countries related to low UVB and low vitamin D – Oct 2010 03 Oct, 2018
UVA causes skin cancer, perhaps UVB (Vitamin D) prevents skin cancer – Jan 2017 27 Jan, 2017
Skin cancer (in mice) due to UV was prevented by vitamin D (active, topical) – June 2016 07 Jan, 2017
Getting little UV is associated with 15 types of Cancer – Jan 2012 26 Aug, 2016
A review of the evidence regarding the solar ultraviolet-B-vitamin D-cancer hypothesis - Oct 2012 08 Jan, 2016
Fewer heart attacks, hip fractures and deaths if more skin cancer – Sept 2013 09 Nov, 2014
Many other anti-cancer photoproducts generated on the skin in addition to vitamin D – Jan 2014 19 Aug, 2014
Less intestinal cancer in mice if add vitamin D, but even less with ultraviolet light – June 2014 05 Jun, 2014
Cancer incidence in 87 countries is related to food, smoking, alcohol, GDP, and UVB - Jan 2014 08 Jan, 2014
Too much UVB: skin cancer, too little UVB: other cancers due to low vitamin D – April 2012 18 Nov, 2013
4 uses of tanning beds per year did not reduce rate of internal cancers – Oct 2013 16 Oct, 2013
Solar UVB reduces Cancer Risk – Grant, Jan 2013 02 Oct, 2013
Eye cancer and UV – Review of controversy – Sept 2013 09 Sep, 2013
More UVB is associated with less cancer – study of 450,000 people – April 2012 13 Apr, 2013
Some childhood cancer 30% less likely in parts of California with more UVB – April 2013 13 Apr, 2013
Texas company claimed tanning beds prevent cancer – had to pay 142,000 dollar fine – March 2013 13 Mar, 2013
China has documented that less UV results in more cancer – June 2010 07 Jan, 2013
The sun appears better at reducing incidence of some cancers than vitamin D – Dec 2012 17 Dec, 2012
Vitamin D protects mouse from skin cancer – Sept 2012 29 Nov, 2012
UVB and vitamin D inversely associated with pancreatic cancer April 2010 31 Oct, 2012
Lack of solar UVB in US is associated with some Cancers - 2006 28 Dec, 2011
Some cancer due to low UV – Grant – April 2010 13 Oct, 2011

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