Letter | Published:

Reduction of Strontium Absorption in Man by the Addition of Alginate to the Diet


CONSIDERABLE effort has been expended in the search for a non-toxic substance which will reduce the intestinal absorption of radioactive strontium without interfering with calcium absorption. A compound which approaches these requirements is an extract from brown seaweed known commercially as sodium alginate. It consists of a mixed polymer of L-guluronic and D-mannuronic acids, of which the ratio, referred to as the G/M ratio, depends on the botanical source and the method of extraction.

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