Science-Based Nutrition Dietary Supplement Helps Enhance Immune System Function Helps Provide Antioxidant Protection Non-gmo / Gluten Free / Nutrition Fucoidan 70% contains the glyconutrient fucoidan extracted from a brown seaweed. Fucoidan is a sulfated polysaccharide. This unique and complex sulfated polysaccharide is not found in other seaweeds or land plants. Seaweeds are a part of the diet in many cultures and fucoidan-containing species have been used traditionally for a variety of therapeutic purposes. Fucoidan displays an abundance of immune-modulating properties and has been shown to mediate a variety of significant biological effects on mammalian cells in laboratory research . Research also suggests that fucoidan may possess significant antioxidant activity .