Do Bras Really Cause Breast Cancer?

health wellness

The short answer to this question is no, bras do not cause breast cancer. The study of breast cancer and cancers in general is extremely challenging, and no one can really point to one cause in particular for cancers. However, there are some clear risk factors for breast cancer which scientists have agreed on after years of studies. Contrary to the “facts” in chain letters you may have read, the risks of things like bras, implants, and underarm deodorant have yet to be proved through scientific study.

The brouhaha over bras and breast cancer was triggered in 1995 when two men published a study which they claimed proved a positive link between bras and breast cancer. Unfortunately, this study is a classic example of a very common problem in science: the tendency to link correlation with causation. The group of women in the study was too small to draw any meaningful conclusions about whether or not bras cause breast cancer, and the higher rates of breast cancer in women who used bras could have been attributed to a number of factors.

The study looked a 4,700 American women in five major cities, and it was supplemented with a study of women in Fiji. The American women had higher cancer rates in general than women in Fiji, and the authors erroneously decided that this was because the American women were more likely to wear bras. Of course, women in Fiji are exempt from many risk factors for breast cancer; for example, white women are at the highest risk for breast cancer, especially when they live in urban areas with a wide range of environmental pollutants, exactly like the women in this study.

No singular thing can be said to cause breast cancer. Some risk factors are gender, age, family history, genetic mutations, and race. Women who have children tend to be less likely to get breast cancer, and breast cancer has also been linked with hormone replacement therapy, alcohol abuse, high weight, and a poor exercise routine. Bras of all styles have not been linked with breast cancer in the hundreds of studies covering millions of women worldwide.

Many scientists believe that environmental toxins could be a significant factor in all sorts of cancer, including breast cancer. People who want to avoid cancers should try to live a healthy lifestyle, especially if they are at high risk. A doctor can provide more information about your risk for breast cancer and he or she will be happy to discuss concerns about what may cause breast cancer.

Although bras do not cause breast cancer, you can choose not to wear a bra for other reasons. However, if discomfort is the primary obstacle to wearing a bra, you may want to consider getting a professional fitting to ensure that you are wearing the right size. There are also a number of different strap styles, as well as wire-free bras, for women who cannot tolerate underwire bras. Ultimately, the decision to wear a bra or not is yours, but don't let pseudoscientific claims scare you away from support garments.

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Discuss this Article

Yeah, definitely I'm gonna not wear a bra and look like a slob who doesnt give a damn how she looks. and it kinda *hurts* when they bounce... the reasearchers must be guys...
- anon35152
hmmm...interesting discussion. it's hard to believe that bras cause all types of breast cancer. does it account for women who have the breast cancer "gene"? also, if american women are being compared to other "cultures" in the study who don't wear bras, maybe we are exposed to certain lifestyle choices and environmental factors that increase our risk of developing breast cancer while these other non-bra wearing cultures have lower incidence of it because of other reasons unrelated to bras? i guess until the study has been proven or disproved, i'll have to keep wearing my bra. or just maybe some smart person will have to invent the "cancer prevention" bra! there's gotta be a way to support those things and still allow the drainage you spoke of. sydsinger, i'm assuming you're a man...in addition to being more comfortable wearing a bra, women have to deal with an overly sexualized culture who would probably misperceive a braless woman as dressing provocatively. i like my support and will probably continue to wear a bra until there is conclusive evidence otherwise.

however, i do appreciate the work you're doing, and thanks for bringing that study and information to our attention! keep up the good work!

- olittlewood
I am a breast cancer researcher and, Yes, bras do cause breast cancer!

A study by Harvard researchers, published in the European Journal of Cancer in 1991, found bra-free women had a lower rate of breast cancer than women who wear bras. And a major study done by husband and wife medical anthropologists Sydney Ross Singer and Soma Grismaijer, documented in their book, Dressed To Kill (Avery/Penguin Putnam, 1995; ISCD Press, 2005) shows a major link between bra wearing and breast cancer. Research to disprove this link has not been done, with the medical/cancer industry trying to ignore the bra issue. And many people comment on this issue without having read the original research, and call the link a myth and pseudoscience without having any scientific evidence to support their opposition to this vital information.

Why would bras be linked to breast disease and cancer? It has to do with the effect of bras on breast circulation, specifically the effect of bras on the lymphatic system.

It is the bloodstream’s job to deliver fresh, oxygenated fluid to the tissues and to remove carbon dioxide. It is the lymphatic system’s job to remove fluid, called lymph, from the tissue spaces, along with debris, viruses, cancer cells, bacteria, toxins, and other unwanted material.

The lymphatic system consists of microscopic vessels that originate in the tissue space and lead to larger, but still tiny, vessels that ultimately enter a lymph node. These nodes are bean-sized filters lined by white blood cells. Most of the breast’s lymph nodes are in the armpit. If the nodes detect a virus, cancer cell, or other foreign or hazardous substance in the tissue fluid, they begin an immune response of producing white blood cells to combat the problem. Once through the lymph node the fluid works its way through larger lymphatic vessels back to the heart and the bloodstream.

One important fact about the lymphatic system is that it is a passive drainage system. While the bloodstream delivers fluid under the pumping pressure of the heart, the lymphatic system has no pressure. Its flow is influenced by gravity, breathing, exercise and movement, and massage. And the slightest constriction or compression of the tissue can close the tiny lymphatic vessels down, inhibiting lymph flow and leading to fluid accumulation, cysts, pain, and tenderness. This fluid congestion within the tissue is called lymphedema.

Women who have fibrocystic breast disease essentially have lymphedema of the breast. Its cause, we discovered, is the impairment of lymphatic flow by pressure from the bra. Bras are elastic garments that exert constant pressure on the breast tissue. Their purpose is to push the breasts into a more fashionable shape. Yet, this pressure can cut down on flow within the lymphatic system, reducing its ability to remove fluid and toxins from the breast tissue.

The toxins that are within the breast tissue include some biochemical products of tissue edema, such as free radicals, which are known to cause cancer. In addition, there are also toxins in our air, food and water, including pesticides, herbicides, heavy metals, and other products of our petrochemically polluted world. Many of these are known to cause cancer. We deliver these toxins to all our tissues each day through the bloodstream. It is the job of the lymphatics to remove these toxins. And it is this job that the bra inhibits by its compression and constriction of the breasts.

This is how bras cause breast cancer. Cancer causing toxins are delivered to the breast tissue by the bloodstream, and are kept there by the bra. The toxins are the bullets. The bra holds them in place, pointed directly at the breasts.

This explains why women have more cancer in the breast than elsewhere in their bodies. The breasts are the most clothing constricted of any organ. It also explains why women have more breast cancer than men, and why breast cancer is only a problem in cultures in which bras are worn. Where there are no bras, there is virtually no breast cancer.

The results of the 1991-93 Bra and Breast Cancer Study is discussed in the book Dressed To Kill: The Link Between Breast Cancer and Bras (ISCD Press). The study was conducted on approximately 4700 U.S. women, about half of whom had breast cancer. When the results were analyzed, they revealed that women who wear bras over 12 hours daily have a dramatically increased risk of developing breast cancer compared to bra-free women. In fact, bra-free women have about the same chances of developing breast cancer as men have, and this is over 100 times less than that for women wearing bras 18-24 hours daily. When you consider that smoking increases the incidence of lung cancer 20-30 times, this makes the link between breast cancer and bras 4-5 times greater than the link between cigarettes and lung cancer!

Of course, the easiest way for a woman to determine if her own bra is damaging her breasts is to go without a bra for a while and feel the difference. You simply have to commit to being bra-free for one month. Your body will tell you the results.

For the thousands of women who have tried this, the results are spectacular. Having bound their breasts since puberty, the feeling of breast freedom sometimes may seem strange at first. But within days, the breasts have their chance to drain of congestion and excess fluid. Tenderness ends. Menstrual breast pain may disappear altogether. Cysts vanish. It’s like a miracle.

Interestingly, some women have become so conditioned to wearing a bra that they feel uncomfortable without one. That is because their breasts have become reliant on the bra for support, causing the loss of function of the musculature and ligaments that normally support the breasts. In other words, bras cause the breasts to be weak and droop. There are many large breasted women of all ages who have firm, healthy, trouble-free breasts because they have never worn a bra.

The congestion of the breasts by the bra also increases breast weight, since the breasts are essentially swollen by edema. This can cause the breasts to feel painful when the bra is removed.

Fortunately, once the bra is no longer worn, the breasts can decongest and can develop their tone again. Many women reported that their breasts lifted up within months of ending the bra habit.

So here’s your challenge. Find a cotton or silk camisole or T-shirt that you feel comfortable in, get rid of your bra, and give your breasts a month without being bound.

- sydsinger

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