Fucoidan Extract

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Swanson GreenFoods Maximum Strength Fucoidan Extract is standardized to 40% total polysaccharides, our Fucoidan brown seaweed extract supplement is available in 500 mg capsules. Preliminary research suggests that they may support the human immune system.


Supplement Facts

Serving Size 1 Vegan Capsule

Servings Per Container 60

Amount Per Serving % Daily Value
Fucoidan Extract (from brown kelp) (Laminaria spp.) (algae) (whole plant) (standardized to 40% total polysaccharides) 500 mg *

*Daily Value not established.

Other Ingredients: Microcrystalline cellulose (plant fiber), vegan capsule (cellulose), magnesium stearate.

Suggested Use: As a dietary supplement, take one vegan capsule per day with water.

Warning: For adults only. Consult your healthcare provider before using this or any product if you are pregnant or nursing, taking medication or have a medical condition.

Storage Instructions: Keep out of reach of children. Do not use if seal is broken. Store in a cool, dry place.




  1. What Is Fucoidan and What Are Its Benefits?
    Fucoidan is a naturally occurring sulfated polysaccharide found in brown seaweeds such as mozuku, wakame, kelp, and bladderwrack. Research suggests fucoidan may help support immune health, antioxidant defenses, healthy aging, and overall cellular wellness. Its unique structure and marine origin have made it one of the most studied bioactive compounds found in sea vegetables.
  2. What Is the Difference Between Fucoidan and Other Seaweed Compounds?
    Unlike iodine, which supports thyroid function, or alginates, which are known for their fiber-like properties, fucoidan is a specialized sulfated polysaccharide found in brown seaweeds. Fucoidan is primarily studied for its role in supporting immune health, antioxidant activity, and cellular wellness, making it distinct from many other nutrients and compounds naturally present in sea vegetables.
  3. What Makes Swanson Pure Maximum Strength Fucoidan Extract Unique?
    Swanson Pure Maximum Strength Fucoidan Extract delivers 500 mg of fucoidan extract sourced from brown kelp and standardized to 40% total polysaccharides for consistent potency. This formula is specifically concentrated for fucoidan, a unique sulfated polysaccharide studied for its role in immune health, antioxidant activity, and cellular wellness.
  4. Is Swanson Pure Maximum Strength Fucoidan Extract Suitable for Special Diets?
    Swanson Pure Maximum Strength Fucoidan Extract is made with non-GMO ingredients and is suitable for vegan and vegetarian lifestyles. It is also gluten free and dairy free, making it a convenient choice for a variety of dietary preferences and restrictions.