Several older research studies indicate that kelp may play a role in preventing breast cancer, pointing to this sea vegetable’s fiber content for the effect. A 2005 study carried out by the University of California, Berkeley, however, credits kelp’s ability to lower the body’s level of estradiol, a sex hormone, with the positive impact on breast cancer risk. This study was performed on rats, so more testing is necessary to confirm this finding for humans.
Breast cysts, or small sacs filled with fluid, commonly affect women in their 30s and 40s. They are generally not a health threat, but may be uncomfortable and can grow large. Sea kelp contains small amounts of essential fatty acids — omega-3 and omega-6 fatty acids — as well as iodine and magnesium, all of which may help reduce the risk of breast cysts.
Sea kelp may contain mercury and arsenic, compounds that may negatively influence your health, both breast and otherwise. Mercury in the foods you eat may leach into breast milk, making it unsafe to breastfeed a child. Arsenic may trigger the development of breast cancer. Both of these environmental toxins may damage your health, as well as the health of your fetus if you are pregnant.