lili said: link [www.diagnose-me.com]
"Sydney Ross Singer and Soma Grismaijer (husband-and-wife authors of Dressed to Kill, Avery Press, 1995) have discovered a possible trigger for breast cancer in interviews of 4,730 women in five major US cities, conducted between 1991 and 1993. They found that:
* Women who wore their bras for 24 hours per day had a 3 out of 4 chance of developing breast cancer (their study included 2056 subjects for the cancer group and 2674 for the standard group).
* Women who wore bras more than 12 hour per day but not to bed had a 1 out of 7 risk.
* Women who wore their bras less than 12 hours per day had a 1 out of 152 risk.
* Women who wore bras rarely or never had a 1 out of 168 chance of getting breast cancer.
The World Health Organization calls chemical toxins the primary cause of cancer. Poisons accumulating in breast tissue are normally flushed by clear lymph fluid into large clusters of lymph nodes nestling in the armpits and upper chest. Because lymphatic vessels are very thin, they are extremely sensitive to pressure and are easily compressed. Chronic minimal pressure on the breasts can cause lymph valves and vessels to close.
A look at the breast cancer rate in countries where bra-wearing is not the norm shows a very low incidence of breast cancer. Japanese women living in Japan, where bra-wearing is uncommon, have a very low incidence of breast cancer; however in second generation Japanese-American women, the breast cancer rate sky-rockets to match that of the Western world.
The overall increase found between 24-hour wearing and not wearing at all was 125-fold.
Highly regarded studies, including one at Harvard, have shown that women who wear bras for extended periods are at much higher risk of developing breast cancer than those who do not. There is strong evidence that this is as a result of impaired lymphatic flow. Wearing a bra, especially a constricting one with underwires and/or tight straps, and especially to bed, prevents normal lymphatic flow and would likely lead to anoxia (lower than normal oxygen content), which has been related to fibrosis, which has been linked to increased cancer risk.
The logical conclusion is that bras should be used as little as possible, if at all. Women evolved under conditions where there was breast movement with every step that they took when they walked or ran. Scientific literature about lymphatic flow indicates that this may be as important as the constriction factor. Every subtle bounce of the breast while moving, walking, running, etc. gently massages the breast and increases lymphatic flow and thus cleans the breast of toxins and wastes that arise from cellular metabolism.
Of course, there may be other mechanisms for the damage that bras apparently cause. One such mechanism could be temperature. Breasts are external organs and have a naturally lower temperature, but this rises when a bra is worn. Cancers can be temperature-dependent; breast cancer is hormone-dependent; temperature can alter hormone function.
All these facts are well-established in medical literature. By whatever mechanism, someone will eventually explain why Singer and Grismaijer found a 125-fold difference in cancer rates between bra-free breasts and those constricted by 24-hour-per-day bra-wearing. They have written a book that is well worth reading, Dressed to Kill, Avery Press, 1995.
Singer and Grismajer suggest that you simply stop wearing one for two weeks and see how you feel. "Don't sleep in your bra!", pleads Singer. "Women who want to avoid breast cancer should wear a bra for the shortest period of time possible - certainly for less than 12 hours daily."
Push-up and sports bras are much worse than loose-fitting cotton bras. You should be able to slip two fingers under the shoulder-straps and side-panels. The higher the side-panels, the more severe the restriction of major lymph nodes. Take your bra off at home. Massage your breasts every time you remove your bra."

No more bras for me!
Well that's me screwed then...