Dear Leestar:This is an excellent question. When contemplating having treatment for fatty deposits above the bra top, it is important to review any history of breast disease, and to ensure that the patient has been following recommendations for routine mammograms and ultrasound of the breast. The typical dose for each injection point, 2/10 of a cc, does not diffuse more than 1 cm from the point of injection. When properly placed, Kybella will not migrate to your breast. You probably know that your breast tissue is a glandular tissue, which is not the same as adipose tissue, so should not be affected by Kybella, which is specific to fat cells only.All the best, Dr. Clark