A Few Words...

What is written here is my opinion and personal experience only. I am not qualified to give advice - medical, legal, or otherwise. Please be responsible and do your own research regarding treatments, diets, doctors, and alternative therapies.

Monday, April 13, 2015

Is the use of dietary supplements safe?

I have written here at least once before about dietary supplements.  As an oncology dietitian, I hear about and research a variety of supplements people use to treat a variety of conditions, including cancer.  They generally turn to these substances because of something they've heard about from someone they know or read on the internet.

Those of us with Meniere's disease are no different in our desperation to find relief from our symptoms and hope for better health.  However, as is so well-described by Catherine Price in her book Vitamania, dietary supplements are the product of a highly unregulated industry and treated by the FDA in near-opposite fashion as compared to pharmaceuticals and over-the-counter drugs.  Namely, anything classified as a medication, the law states, must undergo years of safety and efficacy testing in real humans before being released for sale to the public.  However dietary supplements are in fact allowed to be sold to the public first, without any safety or efficacy data, and can only be pulled from shelves by the FDA after sufficient evidence, usually in the form of consumer complaints, has revealed that they have caused significant harm or death.  Even in such cases, it is up to the FDA to decide whether or not to pursue a recall and that decision is based in no small part on how much it will cost to launch and pursue an investigation, often running into the millions of dollars and many months or years of legal wrangling.

Harm from supplements may occur immediately upon taking a substance, as was the case with ma huang, aka ephedra, before it was banned for sale in the U.S. in 2004 after its use was linked with heart attacks, strokes, and more than 22 deaths.  But use of other supplements, previously believed to promote good health and longevity, as well as protect from diseases such as cancer, have turned out to also be correlated with potential for serious risk, as in the case of beta carotene and lung cancer, vitamin E and selenium and prostate cancer, and folic acid in the case of prostate cancer.

Now here is an article about a newly published study that has found a strong link between the use of common muscle-building supplements and testicular cancer.  Nice.

Muscle-building supplements linked to testicular cancer: Brown University study

Posted on April 13, 2015 by Stone Hearth News
- See more at: http://www.stonehearthnewsletters.com/muscle-building-supplements-linked-to-testicular-cancer-brown-university-study/cancer-testicular/#sthash.oJoDC5Z6.XNWWYLtY.dpuf

PROVIDENCE, R.I. [Brown University] — Men who reported taking muscle-building supplements, such as pills and powders with creatine or androstenedione, reported a significantly higher likelihood of having developed testicular cancer than men who did not use such supplements, according to a new study in the British Journal of Cancer.

Moreover, said study senior author Tongzhang Zheng, the associated testicular germ cell cancer risk was especially high among men who started using supplements before age 25, those who used multiple supplements and those who used them for years.

“The observed relationship was strong,” said Zheng, who led the study at Yale University before joining the Brown University School of Public Health as a professor of epidemiology. “If you used at earlier age, you had a higher risk. If you used them longer, you had a higher risk. If you used multiple types, you had a higher risk.”

Testicular cancer incidence rose to 5.9 cases per 100,000 men in 2011, from 3.7 cases in 100,000 in 1975, Zheng said. Researchers aren’t sure why.

“Testicular cancer is a very mysterious cancer,” he said. “None of the factors we’ve suspected can explain the increase.”

The study is the first analytical epidemiological study of the possible link between supplements and testicular cancer, the authors wrote in the journal. The work was inspired by mounting evidence that that at least some supplement ingredients may damage the testes.

“Our study found that supplement use was related to a higher risk of developing testicular cancer. These results are important because there are few identified modifiable risk factors for testicular cancer,” said Russ Hauser, professor of environmental health science at Harvard T.H. Chan School of Public Health and a main collaborator of the research.

Testing the odds

To conduct the study, Zheng’s research team conducted detailed interviews of nearly 900 men from Massachusetts and Connecticut — 356 of whom had been diagnosed with testicular germ cell cancer, and 513 who had not. In the interviews, researchers asked the men not only about their supplement use but also about a wide variety of other possible factors such as smoking, drinking, exercise habits, family history of testicular cancer, and prior injury to their testes or groin.

After tallying their data and accounting for all those possible confounders, as well as age, race, and other demographics, the researchers found that the men who used supplements had a 1.65 odds ratio (a 65 percent greater risk) of having developed testicular cancer compared to the men who did not use supplements.

The researchers defined “use” as consuming one or more supplements at least once a week for four consecutive weeks or more.

The odds ratios increased to 2.77 (a 177 percent greater risk) among men who used more than one kind of supplement, and to 2.56 among men who used supplements three years or longer. Men who started using supplements at age 25 or younger also had an elevated associated odds ratio of 2.21, the researchers calculated.

“Considering the magnitude of the association and the observed dose-response trends, muscle-building supplements use may be an important and modifiable exposure that could have important scientific and clinical importance for preventing testicular germ cell cancer development if this association is confirmed by future studies,” the authors conclude in the study.

Future large epidemiologic studies and lab experiments would be necessary to establish a causal link between supplements and testicular cancer.

The study’s lead author is Ni Li of Yale University and the Chinese Academy of Medical Sciences. Other authors are Pat Morey of Harvard T.H. Chan School of Public Health; Theodore R. Holford, Yong Zhu, Yawei Zhang, Bryan A. Bassig, Stan Honig, and Helen Sayward of Yale; Chu Chen and Stephen Schwarz of the Fred Hutchinson Cancer Research Center; Peter Boyle of the International Prevention and Research Institute in Lyon, France; Zhibin Hu and Hongbin Shen of Nanjing Medical University; and Pable Gomery of Massachusetts General Hospital.

The U.S. National Institutes of Health, the National Natural Science Foundation of China, The Beijing Natural Science Foundation, and the Beijing Nova Program supported the research.

- See more at: http://www.stonehearthnewsletters.com/muscle-building-supplements-linked-to-testicular-cancer-brown-university-study/cancer-testicular/#sthash.oJoDC5Z6.XNWWYLtY.dpuf

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