The amount of estrogen in your blood is constantly being readjusted. Some foods push hormone levels up. Others bring them down. If you cut the amount of fat in your diet, the amount of estrogen will be noticeably reduced within the very first month. Cancer researchers have taken a great interest in this phenomenon, because lowering the level of estrogen in your blood helps reduce the risk of breast cancer.
Less estrogen means less stimulation for cancer cell growth.
If a woman eating a Western diet cuts her fat intake in half, her estrogen level will be about 20 percent lower. If you cut the fat even more, your estrogen level will drop further. That is a good change. If your hormone level does not rise too high, it will have less effect on your uterine cells. I hypothesized that a change in estrogen is what gets the credit for the newfound comfort that many women experience when they change their diets.