Researchers at the U.K.'s Newcastle University have found alginates in certain varieties of seaweed can block the body's digestion of fat. Even a small amount of alginate served on bread cut subjects' fat uptake by a third, while larger amounts blocked 75%, according to the study published in Food Chemistry. Several food companies are discussing the possibility of bringing alginate-supplemented products to market as early as next year following additional tests, the researchers said.

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