Soy sauce and miso, both of which are fermented products made from soybeans, contain substantial amounts of natural glutamate. This is largely due to the fermentation process that breaks down proteins and releases glutamic acid. These condiments not only provide a savory depth but also enhance the nutritional profile of meals. They have become integral to the culinary practices in many cultures, particularly in East Asian cooking.

While sorbic acid is effective, it is not without its limitations. It is more effective in low pH environments, meaning its efficacy diminishes in foods that are acidic. Therefore, food manufacturers often have to pair sorbic acid with other preservatives to achieve comprehensive protection against spoilage. Additionally, some consumers are concerned about the presence of synthetic preservatives in their food, leading to calls for more natural alternatives. As a result, research into natural preservatives has gained momentum, yet sorbic acid remains a staple due to its well-established benefits and safety profile.