I am overweight. Is it true that breast cancer is more common in obese women?

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Excess fat in a woman’s body can produce extra estrogen and this can stimulate breast cancer cells to form and grow. One of the most common types of breast cancer is estrogen-receptor positive breast cancer. The fatty tissues that live in our abdomen and around the waistline are especially prone to producing estrogen. This is why maintaining a healthy body weight is important, not just for our overall health but also for our breast health.