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Safe dosages of fucoidan intake range from 100 mg to 4,000 mg twice a day. For arthritic and osteoarthritic patients, lower dosages may be more appropriate, whereas those using fucoidan as an immunologic adjuvant cancer treatment would gravitate towards the higher end of the dosage spectrum, depending on doctor advisory. In its liquid form, fucoidan is commercially available, though it is a rare find at most health food stores. It is much more readily available as a dietary supplement in pill form. Fucoidan is also in numerous edible seaweeds (usually dried), including kombu, hijiki, wakame, and Limu moui. However, it is estimated that roughly one kilogram of raw seaweed has about a gram of fucoidan altogether, so the amount of the substance in an edible form is not comparable to its concentration as a supplement. It is important to check for the term “standardized” on the nutritional facts label of fucoidan supplements. If the supplement is not standardized, the milligram amount of actual fucoidan provided in each capsule is likely to be inexact. *