Oral calcium supplements need to be broken down into calcium ions under the action of gastric acid after entering the body to be absorbed and utilized well. Because a large amount of gastric acid will be secreted after meals, it can promote the separation of more calcium ions from calcium tablets, which is beneficial to the body's absorption. For some highly alkaline calcium substances, gastric acid can also have a certain neutralizing effect and reduce irritation to the gastric mucosa.
However, it is important to remember that it is best not to take calcium tablets on an empty stomach, especially for children and the elderly who have weak digestive abilities.
To avoid calcium being excreted from bones at night, people with calcium deficiency should take calcium supplements before going to bed.
In addition, because the body's calcium-regulating hormones are secreted differently during the day and at night, the body's blood calcium concentration will be low at night. Hypocalcemia will stimulate the secretion of parathyroid hormone and accelerate the process of bone calcium decomposition.
If you take calcium tablets at this time, the amount of calcium in the blood will be higher and the calcium in the bones will not be used.
