http://www.docguide.com/news/content.nsf/news/852571020057CCF6852573B1007803ADSAN ANTONIO, TX -- December 14, 2007 -- Physicians may want to advise patients who are at high risk for breast cancer and other progesterone-sensitive conditions to avoid ice cream, butter and other fatty dairy products, based on a study presented here at the 30th Annual San Antonio Breast Cancer Symposium (SABCS).
People absorb significant amounts of bovine progesterone (identical to human progesterone) from dairy products, thanks to the practice among dairy farmers of keeping dairy cattle pregnant most of the time, according to research led by William H. Goodson III, MD, Senior Clinical Research Scientist, California Pacific Medical Research Institute, San Francisco, California.
"Given the magnitude of milk use, we must consider the possibility that a single change in food production technology might have a major influence on the health of young persons who, with the best of intentions, are encouraged to drink milk," the report said.
Dr. Goodson presented the findings in a poster session on December 14. His group measured salivary progesterone levels in 17 male volunteers at baseline and 24 hours later after consuming three servings of high-fat dairy foods (2 tablespoons butter, 2 ounces cheese, and a quart of premium ice cream) between morning and afternoon. The procedure was repeated a week later.
Salivary progesterone levels were seen to spike by 30% to 100% in nearly all subjects after both sets of feedings.
Dr. Goodson said males were chosen because their normal concentrations of progesterone are lower and less cyclic than in females and hence an effect would be easier to measure.