ask
There are claims on the Internet that calcium supplementation can cause kidney stones. Is this true?
answer
When the concentration of soluble substances such as oxalic acid, calcium, and uric acid in the urine is too high, crystals can be formed, and abnormal accumulation of crystalline substances in the kidneys can lead to kidney stones. The main causes of kidney stones are abnormal metabolism of the organism, urinary tract obstruction, infection, foreign body, etc. Calcium supplementation at the right time and in moderation will not cause kidney stones.
Among kidney stones, calcium oxalate stones are the most common one, which is caused by excessive concentrations of oxalate in the body. Calcium and oxalic acid are mainly obtained from food, and the more oxalate the body absorbs, the higher the risk of kidney stones.
When people consume high-calcium foods in a timely and appropriate amount, calcium and oxalic acid will combine in the intestine to produce insoluble calcium oxalate salt precipitation, which prevents oxalic acid from being absorbed into the bloodstream and allows it to be excreted with feces. Therefore, a reasonable intake of calcium can not only reduce oxalate absorption, but also prevent the formation of calcium oxalate kidney stones.
Quizzes
1
Which of the following foods can help with calcium? (MCQs)
A Dairy
B Soy products
C Seafood
D Dark green vegetables
answer
Click on the blank space below to get the answer and analysis
答案:ABCD
Analysis: Milk, soy products, seafood and dark green vegetables are rich in calcium. It is recommended that everyone supplement calcium through food, and at the same time supplement calcium, we should also pay attention to appropriate vitamin D supplementation.
2
What are the ways to prevent kidney stones? (MCQs)
A Drink plenty of water
B Eat less salt
C Reasonable calcium supplementation
D. Eat more vegetables and fruits
answer
Click on the blank space below to get the answer and analysis
Answer: ABC
Analysis: To prevent kidney stones, it is first recommended to drink more water, at least 1.6~1.8 liters of water per day, and reduce the accumulation of crystals in the kidneys by increasing urine output; Secondly, try to maintain a low-sodium diet, because a large amount of sodium will increase the concentration of calcium in the urine, and adults should not eat more than 5 grams of salt per day; Finally, a reasonable intake of calcium, adults are recommended to consume 800 mg of elemental calcium per day. Also, eat less oxalate-containing foods. About 90% of kidney stones are calcium oxalate stones, fruits and vegetables contain a lot of oxalic acid, especially spinach, green peppers are more abundant, pay attention to the amount of food, excessive consumption is easy to form stones in the human body.
Source: Elderly Health News
Answer expert: Zhou Fu, chief physician of the Department of Nephrology, Peking University First Hospital
Planner: Tan Jia, Yu Yunxi, Zheng Yingfan
Editors: Fan Tianyu, Wang Qianhui, Qin Mingrui
Proofreading: Ma Yang
Review: Guan Zhongyao, Xu Bingnan