A study done by Kaiser Permanente researchers suggest that women diagnosed with early-stage bre*st cancer who eat full-fat dairy products after diagnosis are more likely to die from bre*st cancer that women who eat low-fat dairy products after diagnosis.
The hormone estrogen stimulates bre*st cell growth, including the growth of hormone-receptor-positive bre*st cancer cells. Estrogen is created and stored in fat cells. Many researchers believe that dairy products eaten in the United States and other Western countries have high levels of estrogen and progesterone in them because most of the milk is produced by pregnant cow. So it might be possible that low-fat dairy products have lower levels of estrogen and progesterone because most of the fat has been removed.