99% of calcium in the human body exists in the form of bone salts in bones and teeth, known as bone calcium. 1% exists in the form of bound or free ions in soft tissue, extracellular fluid, blood, and tissue organs, known as blood calcium. There is a dynamic balance between bone calcium and blood calcium. When the dietary intake of calcium cannot reach the recommended level, we need to supplement with additional calcium supplements.

Common types of calcium preparations include calcium acetate, calcium carbonate, calcium gluconate, calcium lactate, active calcium, and compound amino acid chelating calcium, each with its own biological characteristics and advantages.

1 Calcium gluconate

It contains about 9% of elemental calcium. It has good water solubility and is easy to absorb. It needs to take more to reach the goal of daily calcium supplementation. It is not suitable for people with high blood sugar and diabetes patients.

2 Calcium lactate

It contains about 13% elemental calcium and has good water solubility. It is necessary to increase the dosage to achieve the daily calcium supplementation goal.

3 Compound amino acid chelated calcium

Containing about 20% elemental calcium, it has high bioavailability and high price.

4 Calcium acetate

Containing about 25.34% elemental calcium, soluble in acidic or alkaline environments with good solubility; The absorption rate is approximately 69% -82%, does not consume stomach acid, and calcium supplementation is efficient.

5 Active Calcium

Containing about 36% elemental calcium, it is made from natural shells through high-temperature drying and electrolysis. Its calcium salts are mainly calcium chloride and calcium hydroxide.

6 Calcium carbonate

Containing up to 40% elemental calcium, easily soluble in stomach acid, with high absorption rate, multiple dosage forms, wide application, and high quality to price ratio.

In the selection of calcium agents, calcium content is not the only criterion. Calcium content, solubility, absorption rate, bioavailability, and safety are all important indicators. Combining calcium sources, dosage forms, and individual conditions, selecting calcium agents based on their characteristics can achieve the best results.

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