Cancer, Hormones & Obesity
An estimated 203,500 new cases of breast cancer expected to occur among US women in 2002. Scientific experts relate the risk of breast cancer to obesity, insulin resistance and hormones.
Hormones and Cancer
Hormones, such as estrogen, estosterone and insulin, plus growth factors, are of special interest since they appear to play a promotional role in the development of breast cancer. Women with higher levels of these hormones appear to have a higher incidence of breast cancer.
Hormones influence the age of puberty. Since rapid growth rate leads to an earlier age at puberty and menarche, it appears that the younger a woman’s age at menarche, the higher her risks of breast cancer.
Obesity, Adult weight Gain and Breast Cancer
Among post-menopausal women, both obesity and adult weight gain have been associated with increase risk for breast cancer. A recent study confirmed a breast cancer death rate which was three times higher among women with a body mass index (BMI) greater than 40 as compared with those women whose body mass index was less than or equal to 18.5.