Coffee and kidney stones

Coffee has become an important drink for modern office workers. The refreshing effect is one of the reasons. In fact, drinking coffee can also cause diseases. Coffee and kidney stones are closely related, it is recommended that we reduce the amount of coffee drinking, water as the main drink.

Coffee and kidney stones

Coffee has always been more right and wrong, because it is a lot of people's life needs, people will ignore it. But one conclusion from recent research has to be alarming, especially for coffee drinkers. The result: people who drink more coffee are more likely to develop kidney stones, so coffee should not be drunk too much. Of course, people with a history of kidney stones and people prone to kidney stones should pay more attention, because for such people, the amount of caffeine contained in two cups of coffee is enough to affect them, making them secrete calcium ions in their urine, thus increasing the risk of kidney and urinary stones.

People with kidney stones should drink less than two cups of coffee or the equivalent of two cups of caffeine per day, and normal people should not exceed twice that amount, or four cups of coffee. The concept of two cups of coffee is 16 ounces (1 fluid ounce equals 2.841 centiliters, 1 centiliter equals 1/100 liter), which translates to no more than 0.455 liters of coffee per day. Normal people should not exceed 1 liter. Of course, you can't use too big a cup, because the bigger the cup, the more caffeine it contains.

Calcium in urine is an important component of kidney stones, so too much calcium in urine can increase the risk of kidney stones. The more calcium in the urine, the easier it is to form stones. Previous studies have shown that even people who do not have or are less prone to kidney stones secrete more calcium in their urine after drinking coffee or caffeinated foods.

The researchers also surveyed the population. They asked 39 kidney stone patients and nine healthy people who had never had kidney stones to drink caffeinated water after fasting for 14 hours, and tested their urine before and two hours after drinking coffee. The results showed that after drinking coffee, the urine concentrations of calcium, sodium, magnesium and citrate increased in people with kidney stones, and of course in people without kidney stones.

Higher levels of calcium and sodium in urine mean an increased risk of kidney stones, while higher levels of magnesium and citrate protect against kidney stones. However, comparing the increase in calcium and sodium with that of magnesium and citrate, it is evident that the latter increase is not as great as the former. Since magnesium and citrate do not counteract the increase in calcium and sodium, too much calcium and sodium puts people at risk for stones, regardless of whether they have a history of kidney stones.