One third of breast cancers could be prevented through changes in lifestyle. So, what do you need to do to reduce your risk?   Around 55,000 women and 370 men are diagnosed with breast cancer every year in the UK according to Breast Cancer Now.  The greatest risk factors are being a woman and aging – and there’s not much you can do about those, but there are a number of things you do have control over that could significantly reduce your risk. In fact, according to Dawn Mussallem, a lifestyle medicine specialist, breast specialist and  Mayo Clinic consultant in…