"Fibrocystic breasts" refers to a condition in which a person's breast tissue feels lumpy or has small fluid-filled cysts. It is a common condition that is not linked to cancer but can cause discomfort or pain. Full definition
In a double - blind study, researchers randomly assigned 56 women with fibrocystic breast disease to receive daily supplements of iodine (70 to 90 mcg I2 / kg body weight) or placebo for 6 months [52]. (ods.od.nih.gov)
Iodine also helps regulate levels of the stress hormone cortisol and contributes to normal immune function.46, 47 Abnormal cortisol levels and deficient immune function are significant contributors to the risks of breast cancer; women with fibrocystic breast disease may also suffer from elevated cortisol levels.48 - 51 (lifeextension.com)
Chances are good that any changes you notice, such as fibrocystic breast changes, are harmless, but it's still essential to have anything new or unusual checked out. (health.com)