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First, carrageenan is already known to America's Food and Drug Administration.
ECONOMIST: HIV microbicides
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Carraguard is the proprietary name of a substance made from carrageenan, a carbohydrate gel derived from seaweeds that is widely used as a stabiliser in the food industry.
ECONOMIST: HIV microbicides
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Carrageenan contains large negatively charged molecules called sulphated polysaccharides.
ECONOMIST: HIV microbicides