If you were to measure the amount of estrogens in a woman's bloodstream as her period ends and a new cycle begins, you would find that it is gradually rising. For about two weeks, it rises toward a peak and then falls quickly around the time of ovulation. It rises again in the second half of the month and then falls just before her next period. The uterus sheds its lining in a menstrual flow, accompanied by crampy pain. 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.