Sea moss is a type of seaweed that is said to be rich in vitamins, minerals, and antioxidants. It has been used for centuries as an herbal remedy, but it has recently gained popularity due to reports on its health benefits. Breastfeeding mothers should use caution when taking any natural supplement while nursing a baby. Sea moss may contain trace amounts of iodine which can pass through breast milk and potentially cause harm to the infant if taken in large doses or over long periods of time. Additionally, sea moss could potentially interact with certain medications that breastfeeding mothers might take such as thyroid medication or blood pressure medication. As such, it's best for nursing moms to consult with their doctor before using sea moss while breastfeeding.