Eating before going to bed can easily produce stones? The doctor said that the best time to take calcium tablets is...

 8:18am, 4 September 2025

There is this saying:

Some people say that they should eat before bed because this can prevent hypoxia in the middle of the night;

Some people also say that they should not eat before bed because it is easy to produce stones,

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Please: Which of these two statements is correct?

Doctor answers

General Surgery, Dr. Huang Yuanhui

1. The balance of ionic ions in the blood is mainly regulated by parathyroid gland. It can promote the release of calcium from the bones, increase the absorption of calcium by the kidney and regulate the excretion of urinary calcium, and maintain the balance of calcium.

2. There are four parathyroid glands in normal people, about as big as beans, hidden behind the thyroid glands in the neck. The parathyroid hormone secreted is a single chain of 84 amino acids that eliminate the hormone.

3. There are many types of calcium tablets. Commonly known agents include calcium calcium, calcium lactic acid, calcium calcium, and calcium carbonate. Some need to be taken after eating, and ionic ion can only be produced by decomposition of gastric acid, such as calcium carbonate; some do not require decomposition of gastric acid and can be absorbed in the kidneys, such as calcium calcium. When taking calcium tablets, you should avoid eating high oxalic acid foods (such as spinach) at the same time, which may cause oxalic acid calcium stones.

4. The secretion of parathyroid glandular is automatically detected and controlled according to the change in the ionic concentration in the blood in the body, and is not related to sleep time. Since 99% of the calcium in the body exists in the bones in the form of crystalline salt, when the calcium ion in the blood decreases, the parathyroid gland secretes appropriate amounts of parathyroid glands to increase the calcium quality in the bones, stimulate the synthesis of active vitamin D to increase the absorption of calcium by the kidney and kidney, and reduce the excretion of urinary calcium to restore the normality of calcium. Therefore, except for the disease of the parathyroid gland itself, or uremia patients, normal people will hardly develop hypoxia.

From this, it is recommended that hypoxia calcification has nothing to do with taking calcification tablets before bedtime, and taking calcification tablets before bedtime is also nothing to do with the production of stones.

Doctor answers

Nutritional health care consultation Chen Zhengyu Nutritional

In fact, the advantage of taking calcium before going to bed is that it can help sleep. As for whether it will cause stones, I think that the conditions for stones that must have excessive calcium stockpiles in the body, other factors also need to be stored at the same time. Only, for example, contains oxalic acid and phytic acid substances. Therefore, under normal circumstances, taking calcium tablets before going to bed will not cause stones, unless the user himself has an abnormal condition. Therefore, before taking calcium tablets, it is best to communicate with the doctor to understand whether calcium tablets need to be taken, and then use it according to its instructions. As much as possible, it is best to take calcium quality from your diet.

In addition, if you really want to take calcium tablets, please pay attention to the following points:

1. The best time to take calcium tablets is after a meal, because the secretion of gastric acid increases, which helps dissolve calcium carbonate.

2. Calcium tablets have the best absorption rate in an environment containing lactic acid, so you can drink a small amount of buttermilk at the same time.

3. When taking calcium tablets, avoid contact with oxalic acid and phytic acid substances, such as drinking a lot of coffee.