Types of calcium are generally divided into inorganic calcium, organic calcium, ultra-micronized calcium carbonate preparations and amino acid calcium preparations, chelated calcium.
1. Inorganic calcium, such as calcium carbonate and calcium hydroxide. Compared with other types of calcium, inorganic calcium has a low absorption rate but is inexpensive. Commonly available on the market are calcium carbonate D3 granules, compound calcium carbonate effervescent granules, calcium hydroxide tablets, etc.
2. Organic calcium, common calcium lactate, calcium gluconate, calcium acetate, calcium citrate, etc. This type of calcium supplements contain less calcium, the advantage is less irritation to the gastrointestinal tract. Such as calcium lactate granules, calcium gluconate tablets, calcium acetate capsules and so on.
3. Ultra-micronized calcium carbonate preparations and amino acid calcium preparations, which have the advantages of good solubility and less irritation to the gastrointestinal tract.
4. Chelated calcium, this kind of calcium preparation has a promotion effect on the absorption rate of calcium. Commonly, there are amino acid chelated calcium, collagen chelated calcium, glycine chelated calcium and so on.
The above drugs should be used under the guidance of a physician.