 [ Symptoms ] does doan is ibuprofen interact with any other medications [ Disease ] in the most recent largest study meta analysis of vitamin d calcium and the prevention of breast cancer both vitamin d and calcium seemed to be protective for the development of breast cancer the best results were among women with the highest intakes of vitamin d and calcium as compared to the lowest levels of consumption the top quarter of women having the highest blood 25ohd levels had a 45 decreased risk of breast cancer another study of 562 women found that the 142 women with a diagnosed breast cancer had on average lower blood levels of 25ohd women with the highest levels of 25ohd had a significantly reduced risk for breast cancer surprisingly use of vitamin d supplements sunbathing and fish intake did increase blood levels of 25ohd    but the lifestyle factors did not directly impact the risk of breast cancer conversely mccullough and colleagues studying almost 22 000 women found no impact of blood levels of 25ohd on the risk of breast cancer a study of almost 42 000 swedish women did not identify linkages between breast cancer risk and sun exposure nor vitamin d intake through diet or multivitamin use