E553) - Magnesiumsilicat

Origin

Magnesium silicates (E553) are a group of inorganic salts formed from magnesium oxide and silicon dioxide. They occur naturally as minerals and are also produced synthetically. The synthetic forms are typically amorphous. The specific types of magnesium silicates used as food additives include magnesium silicate (MgSiO3) and magnesium trisilicate (Mg2Si3O8·nH2O). These compounds are characterized by their high surface area and ability to absorb water and oil.

Usage

In the food industry, magnesium silicates are primarily used as anti-caking agents. They prevent powdered or granular foods from clumping together, ensuring free flow and ease of handling. Common applications include table salt, powdered milk, spices, cocoa products, and baking mixes. They can also be used as filter aids. The European Food Safety Authority (EFSA) has evaluated the safety of magnesium silicates and established an Acceptable Daily Intake (ADI) of 'not specified', meaning no adverse health effects are expected at the levels normally used in food. However, the EFSA has noted that high levels of magnesium silicates could potentially lead to magnesium overload in individuals with impaired kidney function. The FDA also recognizes magnesium silicate as GRAS (Generally Recognized As Safe) under specific conditions of use.

Side Effects

Magnesium silicates are generally considered safe for consumption at levels typically found in food. However, excessive intake of magnesium from any source, including magnesium silicates, can lead to gastrointestinal issues such as diarrhea. Individuals with impaired kidney function are more susceptible to magnesium overload, which can cause muscle weakness, lethargy, and in severe cases, cardiac arrhythmias. Regulatory bodies like EFSA and FDA have set limits on the amount of magnesium silicates that can be added to food to minimize the risk of adverse effects. While allergic reactions are rare, individuals with known sensitivities to silicates should exercise caution. It's important to note that the particle size of magnesium silicates used in food is controlled to prevent respiratory irritation during manufacturing and handling.

Regulatory Status

Magnesium silicates (E553) are permitted food additives in many countries, including those in the European Union and the United States. Regulations specify the types of food in which they can be used and the maximum permitted levels. In the EU, the use of E553 is governed by Regulation (EC) No 1333/2008 on food additives. The FDA regulates the use of magnesium silicate under 21 CFR 182.1400, specifying its use as an anticaking agent in various food products. These regulations are in place to ensure that the use of magnesium silicates in food is safe for consumers.