This study was published in the Journal of the National Cancer Institute 2003 Mar 5;95(5):373-80
Study title and authors:
Plasma folate, vitamin B6, vitamin B12, homocysteine, and risk of breast cancer.
Zhang SM, Willett WC, Selhub J, Hunter DJ, Giovannucci EL, Holmes MD, Colditz GA, Hankinson SE.
Department of Epidemiology, Harvard School of Public Health, Division of Preventive Medicine, Boston, MA 02115, USA. Shumin.Zhang@channing.harvard.edu
This study can be accessed at: http://www.ncbi.nlm.nih.gov/pubmed?term=12618502
The study investigated the association between vitamins B12 and B6 with breast cancer. The dietary habits of 712 women with breast cancer were compared with 712 women without breast cancer.
The study found:
- Women with the highest vitamin B12 had 64% less breast cancer than women with the lowest vitamin B12.
- Women with the highest vitamin B6 had 30% less breast cancer than women with the lowest vitamin B6.
The best dietary sources of vitamin B12 are liver, turkey, fish, beef, lamb and eggs.
Excellent dietary sources of vitamin B6 are liver, eggs, turkey, pork and fish.