Calcium Carbonate – Granulated / Direct-Compression Grade

Calcium carbonate is the most concentrated and economical calcium source, providing about 40% elemental calcium, sourced from purified limestone, precipitated or marine origins. It is the workhorse of calcium tablets and food fortification.

Supplied as a mineral salt / chelate for supplement, premix and fortification use; elemental mineral content is declared on the CoA.

GUTINS Calcium Carbonate — granulated / direct-compression grade is offered for manufacturers, formulators and brands. Specification: granulated / direct-compression grade; form / technology: Salt / chelate; diet suitability: Generally vegetarian.

Product Specifications

Key Benefits

• Contributes to maintenance of normal bones and teeth
• Highest calcium density (~40%) for smaller tablets
• Very cost-effective
• Also acts as a pH regulator and white colour
• Direct-compression grades for efficient tableting

Uses & Applications

Typical applications: Mineral supplementation, premix, tablets/capsules.

• Bone health tablets and capsules
• Calcium + vitamin D3 + K2 formulas
• Multimineral premixes
• Fortified plant milks and juices
• Chewables and effervescent tablets
• Women's and senior nutrition powders
• Bakery and flour fortification

How to Use / Dosage

• Typical daily intake: 500–1,200 mg/day elemental calcium (~40% Ca), best taken with meals
• Typical use level: 20–90% in calcium tablets and antacid-type chewables; 0.1–2% in fortified foods
• Formulation tip: Calculate dosage on elemental mineral content (see CoA), not on total salt weight.
• Weigh accurately and pre-blend small quantities with a carrier (e.g. maltodextrin, MCC or rice flour) for uniform distribution.
• Final dosage should be based on the lot-specific Certificate of Analysis, the target serving size and the rules of your destination market.

Solubility & Formulation

Practically insoluble in water and ethanol; dissolves with effervescence in dilute acids

Storage & Handling

Store tightly closed in a cool, dry place (below 25 °C) protected from moisture and light.. Keep container tightly closed; use clean, dry utensils. Shelf life is typically 24 months in unopened original packaging (see CoA).

Regulatory Note

Calcium carbonate is GRAS in the US (21 CFR 184.1191), EU additive E170 and a permitted mineral source under Directive 2002/46/EC. Prop 65 lead levels should be verified for California.

Diet suitability: Generally vegetarian. This product is supplied as a raw ingredient for further manufacturing and is not a finished consumer product. The buyer is responsible for ensuring the ingredient, its use level and all label claims comply with the regulations of the destination market (e.g. FDA, EFSA, FSSAI, Health Canada, TGA).

Caution & Disclaimer

• Upper limit 2,500 mg/day calcium from all sources (US/EFSA for adults); excess may cause constipation or hypercalcaemia
• May reduce absorption of iron, zinc, thyroid hormone, bisphosphonates, tetracyclines and quinolones – separate dosing
• Absorption depends on stomach acid – take with meals; may cause bloating or constipation
• Use caution in individuals with kidney stones or hyperparathyroidism; combine thoughtfully with vitamin D
• Check heavy-metal (lead) specifications for natural-origin grades

For manufacturing, formulation and professional use only. Not for direct consumption in concentrated form. Keep out of reach of children. Avoid inhalation of dust and contact with eyes; use suitable PPE when handling. Consult a qualified healthcare professional before use if pregnant, nursing, taking medication or managing a medical condition. These statements have not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure or prevent any disease.

Bulk & Wholesale Orders

Need more than 5 Kg, a custom specification, private label support or documentation (CoA, TDS, SDS, allergen and GMO statements)? Contact the GUTINS team for bulk pricing and lead times.