Bladderwrack (Fucus vesiculosus) is a type of brown seaweed that’s tied to traditional medicine. It’s also known as rockweed, red fucus, dyers fucus, rock wrack, black tang, and bladder fucus.
Growing up to 35 inches (90 cm) tall, bladderwrack grows along the coastlines of the Atlantic and Pacific Oceans, the North and Baltic Seas, and various waters in Canada and the United States.
Rich in vitamins, minerals, and antioxidants, many people believe that bladderwrack’s impressive nutrient profile can provide health benefits.
Written by Katey Davidson, MScFN, RD on July 8, 2020 — Medically reviewed by Miho Hatanaka, RDN, L.D.
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