Kidney stones, also known as urolithiasis or kidney stones are actually solid crystals that develop in the urinary system. This renal disorder usually occurs during the thirties and affects more men than women.
When kidney stones move in the urinary tract, it causes severe pain and nausea and vomiting may also occur. This can cause difficulty and an increased frequency of urination (action urination) as well as the presence of blood in urine. The nature of the solid crystals may differ but most often (75 to 85% of cases), they are crystals of salt or calcium oxalate that are causing the problem.
Individuals with obesity (body mass index greater than 30 kg / m2) produce more oxalates making it a risk factor. In addition, people who have hypertension or who have diabetes are also at greater risk of suffering from kidney stones.
Lack of physical activity which, in the long term can lead to loss of bone mass and thus release of calcium can lead to an increased risk of urolithiasis. Feeding and hydration are therefore part of the treatment of stones but also the long-term prevention of recurrence.
The goal is to promote optimal hydration and optimize food behaviors that prevent recurrence of urinary stones.
The purpose is to cause a urine volume by more than 2 liters per day. It is therefore recommended to drink minimally 2 liters of fluid per day, divided into several doses (eg 8 servings of at least 250 ml). It is also advisable to drink at bedtime and once during the night to help remove urine. Water should be the main liquid (at least half of the bus liquids). Urine should be a very pale color or be colorless. During intense physical activity, and when the temperature is hot and humid, it is advisable to increase the amount of liquids bus to 3 liters.
According to some studies, coffee, tea, beer and wine would decrease the formation of kidney stones. Milk, juice and soft drinks do not increase the risk but grapefruit juice should be avoided since it increases the risks.
The case of calcium
Restricting calcium intake does not decrease urinary excretion. Moreover, as calcium imprisons the oxalates present in the stomach, this can reduce their absorption. In short, it is recommended to achieve the requirements of calcium every day. Dietary calcium supplements do not have the same effect as calcium from food. If for health reasons, the supplement is required as in osteoporosis, it is recommended to combine it with a meal.