Calcium tartrate
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Description
Calcium tartrate (E354) is a food additive classified as a stabilizer, used primarily to maintain the texture and consistency of foods. It is the calcium salt of tartaric acid, a natural organic acid found in many fruits, especially grapes. Industrially, it is obtained by reacting tartaric acid (E334) with calcium hydroxide or calcium carbonate, followed by purification and drying.
The final product is a white crystalline powder, odorless, with a slightly acidic taste and limited solubility in water (approximately 0.5 g/100 mL at 20 °C). Its main function is as a stabilizer, forming complexes with metal ions and preventing unwanted reactions such as discoloration or mineral precipitation. It can also act as a firming agent in canned fruits and vegetables, and as a water retention agent in meat products.
The use of calcium tartrate as a food additive was approved in the European Union following evaluations by the European Food Safety Authority (EFSA) and the Joint FAO/WHO Expert Committee on Food Additives (JECFA). EFSA established an Acceptable Daily Intake (ADI) of 0-30 mg/kg body weight for tartaric acid and its salts, expressed as tartaric acid. This ADI is considered safe for the general population, including children and adults.
The food safety of E354 is supported by numerous toxicological studies that have shown no significant adverse effects at authorized use levels. On product labels, it must appear as 'calcium tartrate' or with its E number (E354).
In summary, E354 is a safe and effective additive widely used in the European food industry.
E354 is used in various food categories according to Regulation (EC) 1333/2008. Its main uses include: canned fruits and vegetables (as a firming agent to maintain firmness), bakery and pastry products (as a dough stabilizer), processed meat products (to improve water retention and texture), and beverages (to prevent mineral precipitation).
In the Spanish market, it is found in brands such as 'Hacendado' (canned fruits), 'El Pozo' (sausages), and 'Bimbo' (sliced bread). Authorized limits vary by category: for example, in canned fruits and vegetables up to 500 mg/kg (expressed as tartaric acid) is allowed, while in meat products the limit is 300 mg/kg. Compared to the US FDA, calcium tartrate is considered GRAS (Generally Recognized as Safe) and permitted in similar amounts. In Japan, its use is authorized with similar restrictions. The ADI established by JECFA (0-30 mg/kg bw/day) is the same as that of the EU, ensuring safety at current use levels.
Toxicological studies conducted by EFSA and JECFA have not identified significant adverse effects associated with the consumption of calcium tartrate at authorized doses. In animal studies, very high doses (far above the ADI) caused laxative effects due to the formation of insoluble calcium tartrate in the intestine, but these effects are not observed in humans with normal intake. No genotoxic, carcinogenic, or teratogenic effects have been documented.
The biological mechanism of calcium tartrate is simple: it dissociates into calcium and tartrate ions, which are metabolized and excreted without accumulation. Sensitive populations, such as individuals with renal insufficiency, should exercise caution with any calcium source, but the contribution from the additive is minimal compared to the diet. No relevant drug interactions are known. The conclusion of EFSA and WHO is that E354 is safe for the general population under authorized conditions of use.
Therefore, no relevant side effects are considered for the average consumer.
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