Zitronensäure

Origin

Citric acid is a naturally occurring organic acid found in citrus fruits, such as lemons, limes, and oranges. It is also produced commercially through microbial fermentation of carbohydrate sources, primarily using *Aspergillus niger*. This fermentation process allows for large-scale production at a relatively low cost, making it a widely used food additive.

Usage

Citric acid is a versatile food additive with several functions. It is primarily used as an acidulant to impart a sour or tart taste to foods and beverages. It also acts as a preservative by lowering the pH, which inhibits the growth of spoilage microorganisms. Furthermore, it functions as an antioxidant, preventing enzymatic browning in fruits and vegetables. In beverages, it can act as a buffering agent to maintain a stable pH. Citric acid is used in a wide range of products, including soft drinks, fruit juices, jams, jellies, candies, and processed foods.

Side Effects

Citric acid is generally recognized as safe (GRAS) by regulatory agencies like the FDA. The European Food Safety Authority (EFSA) has also evaluated citric acid and considers it safe for use in foods at current levels. While generally safe, some individuals may experience mild side effects, particularly when consumed in large quantities. These can include gastrointestinal upset, such as nausea, vomiting, or diarrhea. Dental erosion is another potential concern with frequent consumption of acidic foods and beverages containing citric acid. Individuals with sensitivities or allergies should be mindful of their intake. There is no established ADI (Acceptable Daily Intake) for citric acid, reflecting its low toxicity.