Active Fiber is an ion-exchanging polysacchride, classified as a dietary fiber, which is not affected by human digestive enzymes. When ingested by humans, it has the ability to selectively absorb sodium ions in the intestinal tract. This leads to a subsequent lowering of sodium in the blood stream. One gram of Active fiber has the capacity to absorb approximately 60mg in sodium form or about 150mg in sodium chloride form via ionic exchange.

ACTIVE FIBER is an edible, ion-exchanging fiber derived from brown algae. One of the main raw materials, Laminaria Japonica is cultivated in the waters surrounding Hokkaido , Japan and Ascophyllum Nodosum is found in the North Sea . In the development, Shimizu has taken full advantage of its knowledge and techniques accumulated over the long history of purifying dietary fiber