Written By:
Sayer Ji,GreenMedInfo

A new study published in the journal Cancer Epidemiology, Biomarkers & Prevention indicates that women who are long-term users of statin drugs have between 83-143% increased risk of breast cancer.[1]

The population-based case-control study utilized data from women in the Seattle-Puget Sound region, which included 916 invasive ductal carcinoma (IDC) and 1,068 invasive lobular carcinoma (ILC) cases of 55-74 years of age diagnosed between 2000 and 2008, and a control of 902 women.

Whereas recent publicity on statin drugs has focused on their potential use for cancer prevention or as anti-cancer agents, this study found exactly the opposite with current users of statins for 10 years or longer having a 1.83-fold increased risk of invasive ductal carcinoma (IDC) and a 1.97-fold increased risk of invasive lobular carcinoma (ILC) compared to never users of statins.

Additionally, among women diagnosed with hypercholesterolemia, a condition marked by high levels of lipids and lipoproteins in the blood, current users of statins for 10 years or longer had more than double the risk of both IDC [an average of 104% increased risk] and ILC [an average of 143% increased risk] compared to never users.

Of course, the discovery of a correlation between higher statin drug use and higher breast cancer risk does not necessarily imply causation. For instance, women who are on statins are obviously compliant with conventional blood lipid screening recommendations and therefore are more likely to be complaint with breast screening guidelines as well. Given that recent estimates show that breast screenings have resulted in over 1.3 million US women being misdiagnosed and overtreated for breast cancer in the past 30 years, simply being complaint with breast screening guidelines will result in significantly increased risk of being diagnosed with breast cancer regardless of whether the diagnosis is accurate or not. [2]

On the other hand, this latest study could indicate a more serious problem, namely, that cholesterol-lowering drugs and statin drugs in particular are carcinogenic. Statin drugs, in fact, have long been suspected to increase the risk of certain cancers, including prostate,[3] colorectal,[4] and kidney;[5] conversely, low cholesterol has been found to increase the risk of cancer at all sites, further implicating these cholesterol-lowering agents as possible carcinogens.[6]

At the least, this new study raises doubt as to whether the recent push to identify statin drugs as possible chemopreventive or chemotherapeutic agents can be validated by independent science, especially considering that this class of cholesterol-lowering medications have been linked to over 300 adverse health effects in the published literature.

This latest finding is all the more reason why natural dietary and nutritional interventions should be considered a first line defense against elevated blood lipids, and why the very question of whether cholesterol is a primary contributing factor in heart disease should be examined more carefully.

Learn more at our Health Guides: Statin Drugs and Heart Health.


[1] Jean A McDougall, Kathleen E Malone, Janet R Daling, Kara L Cushing-Haugen, Peggy L Porter, Christopher I Li. Long-term statin use and risk of ductal and lobular breast cancer among women 55-74 years of age. Cancer Epidemiol Biomarkers Prev. 2013 Jul 5. Epub 2013 Jul 5.

[3] Chih-Ching Chang, Shu-Chen Ho, Hui-Fen Chiu, Chun-Yuh Yang. Statins increase the risk of prostate cancer: A population-based case-control study. Prostate. 2011 Dec ;71(16):1818-24. Epub 2011 Apr 7.

[4] Fatim Lakha, Evropi Theodoratou, Susan M Farrington, Albert Tenesa, Roseanne Cetnarskyj, Farhat Vn Din, Mary E Porteous, Malcolm G Dunlop, Harry Campbell. Statin use and association with colorectal cancer survival and risk: case control study with prescription data linkage. BMC Cancer. 2012 Oct 22 ;12(1):487. Epub 2012 Oct 22.

[5] Hui-Fen Chiu, Chien-Chun Kuo, Hsin-Wei Kuo, I-Ming Lee, Chien-Te Lee, Chun-Yuh Yang. Statin use and the risk of kidney cancer: a population-based case-control study. Expert Opin Drug Saf. 2012 Jul ;11(4):543-9. Epub 2012 Apr 16.

[6] GreenMedInfo.com, Low Cholesterol Cancer link (8 abstracts)


 

Sayer Ji is an author, researcher, lecturer, and advisory board member of the National Health Federation.
He founded Greenmedinfo.com in 2008 in order to provide the world an open access, evidence-based resource supporting natural and integrative modalities. It is internationally recognized as the largest and most widely referenced health resource of its kind.



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