Therefore, the choice of calcium preparation depends on the percentage of calcium in the preparation. For example, if you want to supplement 600mg of calcium, you only need 1500mg of calcium carbonate, 27 17mg of calcium citrate, 46 15mg of calcium lactate, 6667mg of calcium gluconate and more than 5,000 mg of calcium amino acids. The molecular formulas of some calcium preparations on the market are more complicated than calcium gluconate. It is impossible to ingest 600mg with the preparation of10 ~15 g. Some companies claim that their calcium preparations have a high deposition rate in bones, and there is a threshold problem of calcium deposition in the body. Generally, the threshold of calcium in the body is 1000 ~ 1500 mg. No matter how much calcium is ingested, the threshold of calcium will not increase, so no more calcium will be deposited. In addition, there are two kinds of calcium preparations that need special attention. One is activated calcium, which is made by grinding oysters, mussels, shellfish and other shells near the sea after high temperature activation. This coastal mollusk has a strong adsorption capacity, and can adsorb heavy metals such as lead and mercury in the offshore. Therefore, there are heavy metals in this active calcium, and its pH value is very high, which is alkaline, and the gastrointestinal tract will be reversed after eating it.
Yes Calcium preparations made from the bones of domestic animals and animals are easily polluted by heavy metals, especially lead, because they are easily deposited in bones. These two calcium preparations, especially active calcium, should be eliminated.
Various factors affecting the absorption of calcium preparations The most important factor affecting the absorption of calcium is 1, 25- dihydroxyvitamin D in vivo. This is caused by the reaction between vitamin D in food and 7- dehydrocholesterol in human skin after sunlight irradiation, and then vitamin D3 is synthesized and hydroxylated in liver, especially kidney. It can promote the absorption of calcium in small intestine and even colon. If the human body lacks 1, 25- dihydroxy vitamin D, the absorption of calcium is only 10%. If vitamin D is supplemented, the liver and kidney will synthesize 1, 25- dihydroxy vitamin D, and the absorption rate of calcium will increase to 60 ~ 75%.
It can be seen that the promotion of calcium absorption is secondary to the different types of calcium preparations, mainly because of whether the content of 1, 25- dihydroxy vitamin D in the body is rich or not. 1, 25- dihydroxyvitamin D deficiency The elderly and patients with kidney disease stay at home, which can easily lead to calcium malabsorption and deficiency, and even lead to fractures. After menopause, the lack of estrogen will affect the absorption and lack of calcium. In addition, the lack of growth hormone and parathyroid hormone will also affect the absorption of calcium. People are inactive, such as long-term bed rest, paralyzed patients, astronauts are prone to calcium deficiency under long-term weightlessness, and even osteoporosis and fractures.
The most important thing that affects the calcium balance in the body is not the digestion and absorption rate of calcium, nor how much calcium is excreted in feces. There is only a 25% difference between different calcium preparations. The loss of calcium is mainly in urine, which is generally 50%. If the dietary salt content is high, if you eat a lot of animal protein, calcium will be lost from urine. Spinach, rape and other foods contain a lot of oxalic acid or phytic acid, which will affect the absorption of calcium in the diet. Cellulose in food generally does not affect, but wheat bran will affect the absorption of calcium. Foods containing a lot of fat, phosphoric acid, magnesium and caffeine in the diet will also affect the absorption and excretion of calcium. The antacids used to treat stomach diseases, if containing a large amount of aluminum, will increase the excretion of calcium and affect the deposition of calcium in bones.