First of all, let's understand the difference between domestic and imported calcium supplements. Domestic calcium supplements usually contain only calcium carbonate, which is cheap, but it has great side effects and causes digestive problems such as constipation. Imported calcium supplements usually contain calcium phosphate, the price is slightly higher, but it is closer to the composition of human bones, will not cause constipation, and is more easily absorbed by the human body.
Secondly, for pregnant women, the elderly and osteoporosis patients, it is recommended to choose medical-grade calcium phosphate with vitamin D3. This is because vitamin D3 can promote the absorption and utilization of calcium, and at the same time, vitamin D3 can also improve human immunity and be beneficial to health.
Finally, I suggest that when choosing calcium tablets, you must choose a reputable brand. Because there are some low-quality fake and shoddy products on the market, these products may have bad side effects and cause harm to the body. Therefore, when buying, you must carefully check the product manual and choose a reputable brand.
In a word, it is very important to choose calcium tablets correctly. If you have any health problems, you'd better consult a professional doctor or dietitian before choosing calcium tablets. Choosing a calcium supplement drug that suits you is helpful to maintain good bone health and physical health.