E332 - Kaliumcitrate

Origin

Potassium citrates are salts of citric acid and potassium. They are produced by neutralizing citric acid with potassium hydroxide or potassium carbonate. Citric acid itself is commonly produced by fermentation of sugars, often using *Aspergillus niger*. Potassium citrates exist in various forms, including monopotassium citrate, dipotassium citrate, and tripotassium citrate. These salts are generally recognized as safe (GRAS) substances.

Usage

Potassium citrates are used in the food industry as acidity regulators, buffers, and sequestrants. They help control the pH of food products, preventing spoilage and maintaining desired texture and flavor. They are also used as mineral supplements, providing a source of potassium. In the pharmaceutical industry, potassium citrate is used to treat kidney stones by making the urine more alkaline, which helps to dissolve uric acid crystals and prevent new stones from forming. They are found in beverages, processed foods, and dietary supplements.

Side Effects

Potassium citrates are generally considered safe for consumption at levels typically used in food. Excessive intake of potassium citrates can lead to hyperkalemia (high potassium levels in the blood), especially in individuals with impaired kidney function. Symptoms of hyperkalemia may include muscle weakness, fatigue, and cardiac arrhythmias. Gastrointestinal side effects such as nausea, vomiting, and diarrhea may also occur with high doses. Individuals with kidney problems or those taking medications that affect potassium levels should consult a healthcare professional before consuming large amounts of potassium citrates.

Regulatory Status

Potassium citrates are approved for use as food additives in many countries, including the United States, the European Union, and Canada. In the EU, they are designated with the E number E332. The FDA considers potassium citrate as GRAS (Generally Recognized As Safe) when used in accordance with good manufacturing practices. There is no specific ADI (Acceptable Daily Intake) established for potassium citrates as they are considered safe at levels necessary to achieve their intended technical effect.