Bladderwrack (Fucus vesiculosus) is a certified organic brown seaweed with a long history of use in European herbal tradition. It is one of the richest natural sources of iodine, a mineral essential for healthy thyroid function. Bladderwrack also contains fucoidan, alginates, and a broad spectrum of trace minerals. The dried seaweed can be brewed as a salty, briny tea or added to soups, broths, and baths. Key Benefits Natural iodine source: One of the richest natural sources of dietary iodine, which is essential for normal thyroid function and metabolism. Contains fucoidan: Bladderwrack is a source of fucoidan, a sulphated polysaccharide found in brown seaweeds that has been the subject of growing scientific interest. Rich in minerals: Contains a broad spectrum of trace minerals including calcium, magnesium, potassium, iron, and zinc, absorbed directly from the ocean. Traditionally used for thyroid support: Bladderwrack has been traditionally used in European herbalism to support healthy thyroid function since the 18th century. Certified organic: Organically certified seaweed, harvested and processed without synthetic chemicals. How to Use Bladderwrack tea: Add 1 teaspoon of dried bladderwrack to a cup of boiling water. Steep for 10 to 15 minutes, covered. The flavour is salty and briny. A small amount of Ginger Root or Peppermint helps balance the ocean taste. In cooking: Add small pieces to soups, broths, stews, or rice while cooking for a mineral boost. Rinse briefly before use if a milder flavour is preferred. Bath soak: Add a handful of dried bladderwrack to a warm bath for a traditional seaweed soak. Thalassotherapy (sea-based bathing) has a long tradition in European wellness practice. Good to Know Bladderwrack holds a special place in the history of chemistry. In 1811, French chemist Bernard Courtois accidentally discovered the element iodine while extracting soda ash from seaweed (likely bladderwrack) for Napoleon's gunpowder production. This discovery eventually led to the understanding that iodine deficiency causes goitre. Despite its name, bladderwrack is not a plant. It is a brown alga, belonging to a completely separate kingdom of life (Chromista). The "bladders" are small gas-filled sacs that help the seaweed float upright in the water to capture sunlight. Contains iodine. Excessive iodine intake may affect thyroid function. Do not use if taking thyroid medication, lithium, or blood-thinning medications without professional advice. Not suitable during pregnancy or breastfeeding. This information is not a substitute for medical advice. Consult a healthcare provider before use, especially if pregnant, breastfeeding, or taking medication.
