Consensus about the best time to take calcium supplements, no. Some experts suggest to take it during the day, others by night. Therefore, it is wiser to take the medication 2 - 3 times a day, respectively, breaking apart the daily dose (usual maximum daily dose is 1000 mg). For example, day and night 500 mg.
Whether to take calcium before meals, during meals or after? It depends on what substance is part of the drug. For example, calcium carbonate (calcium carbonate, CaCO3) is better absorbed when taken during a meal or immediately after a meal. If taking the drug on the basis of calcium gluconate, calcium citrate or calcium lactate, the efficiency of absorption is almost the same at any time of the day, whether you eat or not.
In any case, it is recommended to wash down the drug calcium with plenty of fluids, and best of all, plain water. Simultaneous intake of vitamin D together with calcium improves the absorption of this trace mineral. Source of vitamin D in its natural form can serve as fish oils, liver, cream, egg yolk, herring, mackerel, salmon. But the absolute champion of the content of vitamin D in the liver of marine fish. You can take synthetic vitamin D in the form of pellets, tablets. It is also produced by skin exposed to sunlight, so in summer try to walk more in the fresh air.
To prevent osteoporosis - brittleness of the bone tissue caused by lack of calcium, adults are recommended to take per day 400 IU (that is international units) of vitamin D and the elderly from 400 to 800 IU.
Currently, there are three main forms of calcium supplements: regular tablets, chewable tablets and effervescent (quick-dissolving) tablets. The most effective of them is fizzy because they contain more calcium and are absorbed faster. However, tablets also have their advantages. For example, they can be used almost anywhere (in the train compartment, in the auditorium, in a meeting, etc.), not drawing attention to themselves and not disturbing others.