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According to the bra industry, 80% of women wear the wrong size bra and if those bras are too tight, it can restrict of lymph flow in the breast which can lead to breast cancer.
So let's back up a moment and explain the lymph system. The lymph system is essentially your body's filtration system that removes waste and toxins from your tissue. Lymph and nodes practically mirror your circulatory system, but it does not have its own pump. Instead lymph is moved through the body through physical movement, exercise, or manually through a lymph drainage massage.
If your lymph is restricted either through, say, too tight clothing, or you're a couch potato, then the lymph becomes stagnant and toxins will build up.
So if you're wearing a bra, day after day, or 24/7, that is cutting off the lymph flow to your breasts, then you're at risk for cancer.
Read the study from medical researcher Sydney Singer and his wife Soma Grismaijer.