"So many breast cancer correlations are out of my control (e.g. age of onset of puberty, not breast feeding, age of onset of menopause). What can I really do to prevent this?" Many natural diet (eating foods rich in iodine, magnesium, vitamin D) and lifestyle changes (exercise) are showing promise for improving breast health. Taking what we know about the cause of breast cancer can lead us away from breast scare and toward breast care.