Il topless nel periodo della pubertà riduce i rischi del cancro al seno.
La vitamina D è collegata alla diminuzione del rischio di tumore al seno.
By Stephen Daniells
Increased vitamin D levels during youth, from the sun and the diet, may reduce the risk of breast cancer later in life by over 30 per cent, suggests a new epidemiological study.
The study, by researchers from the Samuel Lunenfeld Research Institute at the Mount Sinai Hospital in Canada, adds to a rapidly growing body of science reporting potential benefits of the vitamin against cancer that has led for strong calls to increase recommended intake levels.
The researchers recruited 972 women with newly diagnose invasive breast cancer and 1,135 randomly selected healthy controls and interviewed to assess vitamin D-related variables, such as sunlight exposure (outdoor activity), cod liver oil intake and milk consumption.
After adjusting for potential confounding factors, Knight and her co-workers found that increased exposure to sunlight during adolescence was associated with the highest protection against breast cancer risk later in life, with a risk reduction 35 per cent.
Significant risk reductions were also observed for increased cod liver oil intake (24 per cent risk reduction), and drinking at least 10 glasses of milk per week was associated with a 38 per cent risk reduction.
Source: Cancer Epidemiology Biomarkers & Prevention
Mars 2007, Volume 16, Pages 422-429.
"Vitamin D and Reduced Risk of Breast Cancer: A Population-Based Case-Control Study"
Auteurs : J.A. Knight, M. Lesosky, H. Barnett, J.M. Raboud, R. Viethe
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