Black women are more likely to die from breast cancer than White women. Scientific research supports a link between exposure to harmful chemicals, especially those that interfere with hormone activity, in hair and personal care products and breast cancer risk. Black women use more hair and personal care products containing these harmful chemicals than White women.  It is urgent that we learn more about how these harmful chemicals affect breast cancer development and progression. It is also important to learn more about how Black women at high risk for breast cancer select and use potentially harmful hair and personal care products.  The goal of this study is to combine research data from the laboratory and community to reduce breast cancer risk due to exposure to harmful chemicals in hair and personal care products in Black women.