MAGNESIUM GLUCONATE

CAS: 3632-91-5 NUTRIENT SUPPLEMENT

Magnesium gluconate is a magnesium salt of gluconic acid used as a nutrient supplement and food additive with acidity‑regulating and firming agent properties.

What It Is

Magnesium gluconate is the magnesium salt of gluconic acid identified by CAS number 3632-91-5 and classified as a nutrient supplement and food additive. It appears as a white to off‑white crystalline powder highly soluble in water and is used for its acidity‑regulating and textural properties in foods. In international food additive nomenclature (Codex GSFA), magnesium gluconate corresponds to INS number 580, and it is recognized for its multifunctional roles including nutrient fortification, firmness enhancement, and pH adjustment in a variety of food applications. Its identity as a compound integrates both magnesium, an essential mineral nutrient, and gluconate, the anion derived from glucose oxidation. The presence of magnesium in this compound contributes to its classification as a nutrient supplement, making it distinct from many additives that serve only technological functions. Magnesium itself is an essential macro mineral involved in numerous biological processes in living organisms, and when incorporated into foods as magnesium gluconate, it is intended to provide a source of this mineral in food formulations. Although data on specific numerical regulatory limits or ADI values are not specified here, magnesium gluconate is subject to regulatory evaluation and permitted under conditions of good manufacturing practice in many regions worldwide. Its other chemical identifiers include its PubChem CID 91886357, confirming its identity in major chemical databases.

How It Is Made

Magnesium gluconate is produced by reacting magnesium sources, such as magnesium oxide or magnesium hydroxide, with gluconic acid derived from the controlled oxidation of glucose. The process typically involves neutralizing the gluconic acid with the magnesium base in aqueous solution, followed by concentration, crystallization, and drying to yield the anhydrous salt or hydrate form. The resulting compound may be isolated as a fine powder, with strict purification steps implemented to meet food additive specifications. Manufacturing processes are designed to achieve high purity, often not less than 98 percent on an anhydrous basis, aligning with standards like those described in pharmacopeial monographs. Quality control steps include testing for water content, reducing substances, and elemental impurities to ensure consistency and safety for use in food and nutritional products. This general overview reflects accepted industry practices for producing mineral salts of organic acids and does not rely on proprietary or confidential process details, but rather the typical neutralization and crystallization workflow used for similar food‑grade mineral salts.

Why It Is Used In Food

Magnesium gluconate is used in food primarily for three categories of purposes: technological, nutritional, and quality enhancement. As an acidity regulator, it modulates the pH of food and beverage systems to achieve desired taste balance and stability. Its firming agent functionality makes it useful in products such as processed cheeses, canned vegetables, and fruit preparations, where it helps maintain structural integrity during processing and storage. Additionally, magnesium gluconate serves as a nutrient supplement by contributing a source of magnesium, which is an essential mineral in human nutrition. In this capacity, it may be included in fortified foods and dietary supplement products where an increased magnesium content is desired. The inclusion of magnesium gluconate in formulations can also interact with other ingredients to influence texture and shelf life, fitting within the broader context of multifunctional food additives. Globally, use of this compound in foods is aligned with the conditions of good manufacturing practice and may be subject to specific national or regional regulations that define permitted uses and food categories.

Adi Example Calculation

Because a numerical Acceptable Daily Intake (ADI) was not specified for magnesium gluconate in the JECFA evaluations, it is not possible to provide a regulated numeric calculation example using that ADI. Instead, illustrative examples for nutrient sources typically relate magnesium intake from fortified foods to general dietary reference values. For example, if a fortified beverage provided 30 milligrams of elemental magnesium per serving from magnesium gluconate, and a hypothetical adult consumed two servings per day, the total magnesium intake from the additive source would be 60 milligrams. This illustrative calculation simply demonstrates how nutrient contribution from an additive can be tallied against broader dietary reference intakes for magnesium, which may be established by nutrition authorities separate from food additive safety assessments. Such examples are not regulatory limits but help contextualize how magnesium from fortified foods contributes to overall nutrient intake.

Safety And Health Research

Safety evaluations of magnesium gluconate and related gluconate salts have been conducted by international expert bodies. The Joint FAO/WHO Expert Committee on Food Additives (JECFA) reviewed magnesium gluconate within a group that included other gluconates such as calcium and sodium gluconate and reported no specific ADI for this group in the published specifications, indicating that an explicit numerical ADI was not allocated in the evaluation reports. Regulatory listings in databases such as the U.S. FDA Substances Added to Food reflect historical acceptance as a food substance and nutrient supplement, with safety considerations inherent in good manufacturing practice use. Toxicological data supporting these evaluations typically encompass assessments of general toxicity, genotoxicity, and nutrient source profiles rather than unique hazards associated with magnesium gluconate itself. In practice, magnesium gluconate is considered safe when used within permitted uses and levels, with its safety profile comparable to other mineral salts of organic acids. Academic and industry research on magnesium bioavailability suggests that organic magnesium salts, including magnesium gluconate, provide a bioavailable source of magnesium, though such research is separate from regulatory safety evaluations and should not be interpreted as establishing dietary recommendations.

Regulatory Status Worldwide

Magnesium gluconate is recognized internationally as a food additive and nutrient supplement. In the United States, it appears in the FDA Substances Added to Food database, indicating its permitted use as a substance added to food, typically under the designation of a nutrient supplement and with reference to the Select Committee on GRAS Substances (SCOGS) evaluations. This listing reflects historical acceptance rather than a specific current CFR regulation citation, and the absence of an explicit CFR section here means that formal numeric limits are not specified. Under the Codex General Standard for Food Additives (GSFA) maintained by the Codex Alimentarius Commission, magnesium gluconate is included with INS number 580 and may be used in specified food categories under conditions of good manufacturing practice, with functional classes including acidity regulator, firming agent, and flavour enhancer. At the international level, the Joint FAO/WHO Expert Committee on Food Additives (JECFA) evaluated magnesium gluconate and related gluconate salts, and in that context, a group ADI was not specified for the gluconate group in published evaluations. In the European Union, additives with assigned INS numbers such as E580 are generally subject to inclusion on the Union list of authorized food additives and corresponding specifications, though ongoing regulatory assessment programs such as re‑evaluation by EFSA may influence formal authorization statuses and conditions of use. Regulatory frameworks in other regions, including Australia/New Zealand and Codex GSFA member states, also recognize magnesium gluconate’s use under defined good manufacturing practice provisions.

Taste And Functional Properties

Magnesium gluconate is generally described as tasteless and odorless in its pure form, making it suitable for incorporation into a wide range of food and beverage matrices without significantly altering sensory profiles. Its high solubility in water supports its use in liquid and semi‑liquid products, contributing to consistent dispersion and interaction with other ingredients. Functionally, it exhibits acidity‑regulating properties that can help balance flavor profiles and stabilize pH during processing or storage. The firming agent role enhances texture in products such as processed cheeses and canned fruits or vegetables, helping to maintain firmness under thermal or mechanical stress. Although it does not impart a distinct taste, its mineral nature contributes a subtle ionic presence that, at higher levels, may influence mouthfeel. Magnesium gluconate’s stability under typical processing conditions such as moderate heating and mixing supports its utility in diverse food applications, where it can perform multiple roles without compromising product quality.

Acceptable Daily Intake Explained

An Acceptable Daily Intake (ADI) is a regulatory concept used to describe the amount of a substance that can be consumed daily over a lifetime without appreciable health risk, expressed relative to body weight. For many food additives, ADIs are established by expert committees such as JECFA or EFSA based on toxicological data. In the case of magnesium gluconate and related gluconate salts, a group ADI was not numerically specified in the published JECFA evaluations, reflecting a determination that dietary exposure under conditions of good manufacturing practice does not warrant a defined numerical ADI. This absence of a specified ADI does not equate to an unrestricted intake but indicates that magnesium gluconate’s safety profile supported its use within established regulatory frameworks and good manufacturing practice conditions. When considering nutrient sources such as magnesium gluconate, consumers may also refer to dietary reference values for magnesium established by nutrition authorities, which represent nutritional intake ranges rather than safety limits set for additives. Regulatory bodies examine both toxicological and nutritional information to ensure that additives serving as nutrient sources provide benefits without safety concerns at expected intake levels.

Comparison With Similar Additives

Magnesium gluconate can be compared with other mineral‑based food additives that provide nutrient supplementation or functional properties. Calcium gluconate (INS 578) similarly serves as an acidity regulator and nutrient source for calcium, supporting structural functions in food matrices. Potassium gluconate (INS 577) offers a source of potassium while also contributing to pH balance and ionic properties. Magnesium diglutamate (E625) is another magnesium salt but functions primarily as a flavour enhancer rather than a nutrient supplement; its application differs despite both compounds contributing magnesium. Compared with inorganic magnesium salts such as magnesium chloride or magnesium sulfate, organic salts like magnesium gluconate are generally more soluble and may provide bioavailable forms of magnesium when used in fortified foods or supplements. Each of these additives has distinct functional and regulatory contexts, and choice among them depends on the desired technological action, nutritional contribution, and formulation constraints in specific food products.

Common Food Applications Narrative

Magnesium gluconate finds broad application across different categories of food and beverage products due to its multifunctional properties. In dairy products and analogues, such as processed cheese and flavored milk drinks, it can help maintain texture and pH stability during manufacturing and shelf life. In canned fruits and vegetables, the firming agent function supports the structural integrity of plant tissues subjected to heat treatments. Ready‑to‑eat savouries and prepared foods benefit from magnesium gluconate’s ability to contribute to textural consistency and pH regulation. Water‑based flavored beverages, including electrolyte drinks and other sports or energy drinks, may incorporate magnesium gluconate as a source of magnesium to enhance the nutritional profile while maintaining clarity and taste neutrality. The additive is also included in food supplements and dietetic foods to supply magnesium, an essential nutrient, to consumer diets. Across these applications, its compatibility with a variety of formulation ingredients and processing conditions makes it a versatile choice for food technologists seeking to balance functional performance with nutritional enhancement.

Safety & Regulations

FDA

  • Notes: Included in FDA Substances Added to Food inventory without explicit CFR section citation.
  • Approved: True

EFSA

  • Notes: EFSA authorisation details not explicitly available in sources.
  • E Number: E580

JECFA

  • Year: 1998
  • Notes: Group ADI not specified for gluconate group by JECFA.
  • Ins Number: 580

Sources

Comments

No comments yet. Be the first to share!