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Enriched flour


Enriched flour is flour with specific nutrients returned to it that have been lost while being prepared. These restored nutrients include iron and B vitamins (folic acid, riboflavin, niacin, and thiamine). Calcium may also be supplemented. The purpose of enriching flour is to replenish the nutrients in the flour to match the nutritional status of the unrefined product. This differentiates enrichment from fortification, which is the process of introducing new nutrients to a food.

White flour became adopted in many cultures because it was recognized as being healthier than dark flours during the late Middle Ages. The unknown factor for its benefit at that time was that mold and fungus in the grains, which led to several diseases, were eliminated in the processing that resulted in white flour.

In the 1920s, Benjamin R. Jacobs began to document the loss of essential nutrients, however, through this processing of cereals and grains and to demonstrate a method by which the end products could be enriched with the lost nutrients. These nutrients promote good health and help to prevent some diseases.

The international effort to start enriching flour was launched during the 1940s as a means to improve the health of the wartime populations of the British and United States while food was being rationed and alternative sources of the nutrients were scarce. The decision to choose flour for enrichment was based on its commonality in the diets of those wartime populations, ranging from the rich to the poor. A major factor in the switch to enriched flour in the United States was the U.S. Army's restriction in 1942, that it would purchase only enriched flour.

The conversion of grains to flour involves several steps that vary with the type of grain used. The initial stages of processing remove the bran and the germ of the seed. The bran is the outermost layer of grains that contains fiber (primarily insoluble), some protein, and trace minerals. The germ is the embryo of the seed that contains B vitamins and trace minerals. Because the germ has a fat content of 10%, it may reduce shelf-life. Thus, it is separated to ensure longer shelf life of the flour. In contrast to enriched flour, whole wheat flour contains both the bran and the germ. The remaining and largest portion of the seed is the endosperm. It acts as a nutrient reservoir for the developing embryo. The endosperm contains a large amount of carbohydrates, protein, iron, B vitamins (niacin and riboflavin), and soluble fiber.


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