Who should not take sea moss?

Sea moss, especially in large quantities, may cause side effects and may not be safe for some people. This can include people with hypothyroidism.

While allergies to seaweed and sea moss are uncommon, it is still possible to develop an allergy to sea moss. If you have any symptoms of an allergy, including itchiness or hives, you may need medical attention. Some severe allergy symptoms, such as throat swelling or difficulty breathing, require emergency medical attention.

Medically reviewed by Adrienne Seitz, MS, RD, LDN, Nutrition — Written by Lauren Panoff, MPH, RD — Updated on July 2, 2024