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These stories are false, according to the National Cancer Institute and the Food and Drug Administration, whose investigations have found no link between the use of underarm antiperspirants or deodorants and the subsequent development of breast cancer.
5. Microwave ovens causes cancer.
Possibly. Microwave ovens, like other household electronics, such as televisions and electric blankets, emit electromagnetic fields (EMFs) just like power lines and transmitters. For more than a decade, several studies have been evaluating children’s and adults’ residential EMF exposure to determine what, if any, increased risk they pose in developing brain cancer, leukemias and lymphomas, or breast cancer.
Most of the findings have been inconclusive, although there is some limited evidence linking EMF exposure to childhood leukemia, and very small increases for breast cancer and leukemia in adults exposed to occupational EMFs. The National Institute of Environmental Health Sciences recommends increasing the space between EMF-emitting devices and yourself and always discouraging children from playing near power lines.
6. Having a positive attitude cures cancer.
The link between thinking positive and beating cancer has been hotly debated for many years. While anecdotally, some people claim positive thinking has cured their cancer, there is no scientific evidence to support it, so this one is False.
Having a positive attitude doesn’t give you an advantage during treatment or improve your chances of being cured, says Author Barbara Ehrenreich, who also holds a Ph.D. in cellular immunology. Popular culture asserts having a positive attitude boosts a person’s immune system allowing your body to better fight the cancer.
“Medically speaking your attitude has nothing to do with your own survival. The immune system is structured to fight microbes, and unfortunately, cancer is caused by our own cells gone amuck,” she says.
This may be a case of "it might not help but it doesn't hurt either".