Nano is a prefix meaning extremely small.. When quantifiable, it translates to one-billionth, as in the nanosecond. Nano comes from the Greek word nanos, meaning dwarf..ano is a prefix meaning extremely small.. When quantifiable, it translates to one-billionth, as in the nanosecond. Nano comes from the Greek word nanos, meaning dwarf..
Aug. 19, 2003 -- Obese women may be more likely to develop breast cancer largely because their bodies produce more estrogen than thin women do. New research suggests that the increase in breast cancer risk faced by obese postmenopausal women may largely be due to higher levels of estrogens circulating in their bodies.
Obesity leads to the reduction of SHBG (sex hormone binding globulin) a protein that binds estrogen levels and keeps them out of circulation. When these levels go down, estrogen levels go up, become active, and thus stimulate the growth of breast cancer cells. Over one hundred studies have investigated the links between obesity and breast cancer.