Magnesium Gluconate for Supplements

Magnesium gluconate is an organic magnesium salt of gluconic acid used as a nutritional magnesium source in dietary supplements, fortified foods, mineral blends, and formulated nutrition products. Its water solubility and established food-use applications make it suitable for manufacturers developing powders, tablets, capsules, liquids, and other magnesium-containing products.

Product Overview

Magnesium gluconate is the magnesium salt of D-gluconic acid. Commercial material may be supplied as anhydrous magnesium gluconate, dihydrate, or a mixture of hydration states. The anhydrous compound has the molecular formula C12H22MgO14 and a molecular weight of 414.60 g/mol, while the dihydrate has the formula C12H26MgO16 and a molecular weight of 450.63 g/mol.

Magnesium gluconate is recognized as a nutrient supplement ingredient in U.S. food-ingredient records and is also covered by USP and FCC monograph references. FCC describes it as a white to off-white powder or granulate that may be anhydrous, dihydrate, or a mixture of both.

What Is Magnesium Gluconate?

Magnesium gluconate combines magnesium with gluconate, an organic acid salt. It is commonly selected when a formulation requires a soluble magnesium ingredient in a gluconate form. Because hydration state changes the molecular weight and theoretical magnesium concentration, procurement specifications should clearly identify the intended form and assay basis.

Specifications

Key Benefits

• Provides magnesium in an established gluconate salt form for nutritional formulations.
• High water solubility supports applications where a soluble magnesium ingredient is required.
• Suitable for tablets, capsules, powder blends, liquid formulations, and fortified nutrition products.
• Available in specifications covering different hydration states and application requirements.
• Can be supplied with technical documentation for B2B procurement and incoming quality inspection.

Applications

Dietary Supplements

Magnesium gluconate is used as a magnesium source in tablets, capsules, powders, liquid supplements, and other nutritional dosage forms.

Mineral Premixes

It can be incorporated into mineral blends and customized nutritional premixes where the formulation requires magnesium in gluconate form.

Fortified Foods and Nutrition Products

Magnesium gluconate can be used in selected food and nutrition formulations as a magnesium-containing ingredient. Final use levels, labeling requirements, and applicable regulations should be reviewed for the target market.

Liquid and Soluble Formulations

Its high water solubility makes magnesium gluconate suitable for formulations where dissolution and aqueous processing are important considerations.

Buyer Decision Guide: Hydration State and Elemental Magnesium

The key procurement issue for magnesium gluconate is not simply the headline assay percentage. Buyers should identify whether the material is anhydrous or dihydrate because hydration changes molecular weight and the theoretical elemental magnesium concentration. USP defines its assay on an anhydrous basis, making the calculation basis particularly important when comparing specifications from different suppliers.

For a finished product with a defined elemental magnesium target, formulation calculations should use the actual agreed magnesium specification rather than comparing magnesium gluconate percentages alone. This is especially important when changing hydration state, supplier, or assay basis.

Why Choose This Product

• High-purity magnesium gluconate options for nutritional and food-related formulation.
• Standard and customized specifications available for different processing requirements.
• Batch testing can cover identity, assay, elemental magnesium, heavy metals, microbiological quality, residual solvents where applicable, and moisture.
• Produced under GMP-standard conditions with in-house R&D and testing support.
• Technical documents such as COA, TDS, and SDS can support procurement, formulation, and incoming inspection.
• OEM and ODM support can include customized formulations, finished-product manufacturing, labeling, private label, and packaging.
• Suitable for stable bulk supply and international B2B procurement.

Packaging Options

Common bulk packaging includes 1 kg or 5 kg aluminum foil bags for smaller quantities and 25 kg fiber drums for larger-volume procurement. Packaging configurations can be customized according to transportation, storage, filling, and finished-product manufacturing requirements.

OEM & Private Label

Magnesium gluconate can be incorporated into customized mineral formulations and finished nutritional products. Customization may include dosage-form development, ingredient blending, private-label packaging, labeling, and finished-product manufacturing. Particle characteristics and packaging formats can be adapted to the intended processing route.

Quality Control

Commercial magnesium gluconate should be tested against the agreed specification and the applicable food or nutritional ingredient standard. Typical quality-control checkpoints include:

• Identity verification
• Purity and assay testing
• Elemental magnesium verification
• Hydration or moisture verification
• Heavy metals analysis
• Microbiological testing
• Residual solvent testing where applicable
• Physical appearance and packaging inspection

Third-party testing and relevant certifications can be available according to the product specification and target market. Final regulatory and labeling requirements should be reviewed before commercialization.

Procurement FAQs

How do I choose between anhydrous and dihydrate magnesium gluconate?

First determine the required elemental magnesium contribution and the specification basis used in your formula. Anhydrous magnesium gluconate theoretically contains approximately 5.86% magnesium, while the dihydrate contains approximately 5.39%. Confirm the actual supplier specification before calculating the required input quantity.

What assay should I request for magnesium gluconate?

For USP-oriented procurement, the magnesium gluconate monograph specifies 98.0% to 102.0% of anhydrous magnesium gluconate calculated on the anhydrous basis. For other food or nutritional applications, the appropriate assay should be stated in the purchase specification according to the intended grade and market.

What documents should be requested for incoming inspection?

A COA is typically used to verify the batch against agreed specifications, while TDS and SDS provide technical and handling information. Depending on the destination market and product category, buyers may also request applicable third-party testing reports and certification documentation.

How should magnesium gluconate be stored?

Store magnesium gluconate in a cool, dry environment in tightly closed packaging and protect it from excessive moisture, heat, and direct sunlight. Consistent storage is particularly important when the purchased specification distinguishes between anhydrous and hydrated material.

Conclusion

Magnesium gluconate is a versatile magnesium ingredient for dietary supplements, mineral premixes, fortified nutrition products, and soluble formulations. For bulk sourcing, buyers should focus on hydration state, assay basis, elemental magnesium content, solubility, grade, particle characteristics, and technical documentation. Contact us today to request samples, a COA, technical documents, and a wholesale quotation for magnesium gluconate.