Study: Cola & Non-Cola Sodas Increase Levels of Estrogen – a Known Risk for Breast Cancer

Leslie Carol Botha: – Time to ditch the soda.  Diet or sweetened. An new study shows that sweetened soda and energy drinks affect the reproductive hormones and ovarian function; i.e fertility.  Let’s face it – the chemicals we ingest – affect the health of our body.  This ain’t rocket science people.  You are better off drinking water…. filtered water that is.  There are a lot of hormones circulating in our waterways too.

And let’s not forget the BPA used as a coating on the inside of the ALUMINUM (known neurotoxin) cans.  And why are you drinking soda?

Sweetened soda increases circulating estrogen in premenopausal women

Food for Breast Cancer
Posted: February 7, 2013
News type: Breast cancer study
Publication: American Journal of Clinical Nutrition, January 2013
Study name: Energy-containing beverages: reproductive hormones and ovarian function in the BioCycle Study

Parabens were found in breast cancer, but the link is not proven
Frequent consumption of added sugar, sugary sweets, and high-sugar desserts is associated with increased risk of breast cancer. This is true not only of women with metabolic syndrome or type 2 diabetes, but also of those who are not overweight and not insulin resistant. Fructose has been shown to induce more aggressive characteristics in triple negative (ER-/PR-/HER2-) breast cancer cells. Now a new study has reported that sweetened soda consumption increases the level of circulating estrogen, a known risk factor for breast cancer.

Sugar and breast cancer

The idea that breast cancer is “fed by sugar” is not the correct explanation for the association between sugar consumption and breast cancer risk. All of our cells require energy in the form of glucose to function. Cancer cells typically consume glucose at a much higher rate than normal cells. However, cancer cells will obtain glucose from a variety of foods in the diet. Consuming sugars such as sucrose and fructose appears to have specific breast cancer-promoting effects, such as increasing estrogen and insulin production, in addition to potentially serving as an energy source for cancer cells.

Latest research links sweetened soda to estrogen levels

The study referenced at the beginning of this news story was designed to examine the associations between energy-containing beverages, added sugars, and total fructose intake and reproductive hormones in premenopausal women. The term energy-containing beverages refers to calorie-containing (as opposed to artificially sweetened), not “energy drinks” such as Red Bull. The authors were interested in the possible effects of sugar intake on fertility. The study included 259 women in the BioCycle Study who were followed for up to two menstrual cycles. Blood was drawn from study participants during up to eight visits per menstrual cycle. The women also provided four 24-hour dietary recalls per cycle.

Women who consumed at least one cup (237 mL) of sweetened soda per day were found to have 16.3% higher estradiol concentrations compared to women who consumed less sweetened soda after adjusting for age, body mass index (BMI), dietary factors, race, and level of physical activity. Estradiol, which is the most important estrogen, influences the development and maintenance of feminine characteristics by binding to estrogen receptors. Cola and non-cola sodas produced similarly elevated estradiol concentrations. On the other hand, artificially sweetened soda and fruit juice consumption were not significantly associated with reproductive hormones.

Read full article…


Author: Leslie Carol Botha

Author, publisher, radio talk show host and internationally recognized expert on women's hormone cycles. Social/political activist on Gardasil the HPV vaccine for adolescent girls. Co-author of "Understanding Your Mood, Mind and Hormone Cycle." Honorary advisory board member for the Foundation for the Study of Cycles and member of the Society for Menstrual Cycle Research.


  1. Yet another good reason to avoid pop, this is the number one thing I tell people. I hadn’t come across this research myself, this is a good find.

    I wrote an article based off of a princeton study that talks about other good reasons to avoid cola. Hopefully people can cut out all the High fructose Corn syrup from their diets. Glad to see the word getting out more!

  2. Glad to have you here Ron – I so agree – these products are very dangerous and should be off the market. High fructose corn syrup also contains mercury – a known neuro-toxin.

    Hormonally yours,


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