Soy Sauce The addition of soy sauce into food involves the consumer ingesting monosodium glutamate (MSG) as well. The process of fermenting soy when producing soy sauce breaks down the soy into its components. Soy protein is one of them, releasing free gultamic acid into the soy sauce, also known as MSG. Most types of soy sauce, organic or low sodium, must ferment the soybeans to produce the rich, meaty flavor. Naturally brewed soy sauce is controversial on whether it contains MSG or not. Using traditional Japanese methods, the soy bean is fermented using lactic acid bacteria and yeasts. Chemically produced soy sauce has a weaker aroma and flavor, compensating the lack of flavor with MSG. The effects of consumption of too much high-sodium soy sauce can also lead to hyper-tension which involves increased heart rate and high blood pressure. James, Delores C.S.. What Is Hypertension? Internet FAQ Archives - Online Education - faqs.org. Web. 17 May 2011. <http://www.faqs.org/nutrition/Hea-Irr/Hypertension.html>. â€œKikkoman soy sauce museum.â€� Kikkoman Corporation. Web. 17 May 2011. <http://www.kikkoman.com/soysaucemuseum/difference/index.shtml>. â€œTechnology of production of edible flours and protein products from soybeans. Chapter 9.â€� FAO Home. Web. 17 May 2011. <http://www.fao.org/docrep/t0532e/t0532e10.htm>.